ci: Fix artifact handling for GitHub Actions v4

- Updated artifact upload steps to assign unique names (NuGet-Fluent, NuGet-Roboto, NuGet-OpenSans) to address changes introduced in actions/upload-artifact@v4.
- Modified publish job to download artifacts by job-scoped names into separate directories (artifacts/fluent, artifacts/roboto, artifacts/opensans).
- Adjusted signing and pushing steps to ensure consistent handling of artifacts across jobs and publishing.

(cherry picked from commit 28b88be)

# Conflicts:
#	.github/workflows/ci.yml

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       uses: actions/checkout@v2
       with:
         fetch-depth: 0
- 
+
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
@@ -51,16 +51,22 @@ jobs:
         rm *.cs
         dotnet build -c Release
         cp bin\Release\netstandard2.0\uno.fonts.fluent.dll ../Fluent
-    
+
     - name: Pack
       run: |
         $adjustedPackageVersion="${{ steps.gitversion.outputs.semVer }}".ToLower();
         build/nuget.exe pack nuget/Fluent/Uno.Fonts.Fluent.nuspec -Version $adjustedPackageVersion -OutputDirectory ./artifacts
+<<<<<<< HEAD
 
     - name: Upload Artifacts
       uses: actions/upload-artifact@v2
+=======
+
+    - name: Upload Fluent Artifacts  # Changed to have unique name for artifacts
+      uses: actions/upload-artifact@v4
+>>>>>>> 28b88be (ci: Fix artifact handling for GitHub Actions v4)
       with:
-        name: NuGet
+        name: NuGet-Fluent
         path: ./artifacts
 
   build_roboto:
@@ -73,7 +79,7 @@ jobs:
       uses: actions/checkout@v2
       with:
         fetch-depth: 0
- 
+
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
@@ -108,10 +114,15 @@ jobs:
         $adjustedPackageVersion="${{ steps.gitversion.outputs.semVer }}".ToLower();
         msbuild nuget\Roboto\Uno.Fonts.Roboto\Uno.Fonts.Roboto.csproj -t:pack -p:Configuration=Release -p:PackageVersion=$adjustedPackageVersion -p:PackageOutputPath=artifacts
 
+<<<<<<< HEAD
     - name: Upload Artifacts
       uses: actions/upload-artifact@v2
+=======
+    - name: Upload Roboto Artifacts  # Changed to have unique name for artifacts
+      uses: actions/upload-artifact@v4
+>>>>>>> 28b88be (ci: Fix artifact handling for GitHub Actions v4)
       with:
-        name: NuGet
+        name: NuGet-Roboto
         path: nuget\Roboto\Uno.Fonts.Roboto\artifacts
 
   build_opensans:
@@ -124,7 +135,7 @@ jobs:
       uses: actions/checkout@v2
       with:
         fetch-depth: 0
- 
+
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
@@ -147,10 +158,15 @@ jobs:
         $adjustedPackageVersion="${{ steps.gitversion.outputs.semVer }}".ToLower();
         dotnet pack nuget\OpenSans\Uno.Fonts.OpenSans\Uno.Fonts.OpenSans.csproj -c Release -p:PackageVersion=$adjustedPackageVersion -p:PackageOutputPath=artifacts
 
+<<<<<<< HEAD
     - name: Upload Artifacts
       uses: actions/upload-artifact@v2
+=======
+    - name: Upload OpenSans Artifacts  # Changed to have unique name for artifacts
+      uses: actions/upload-artifact@v4
+>>>>>>> 28b88be (ci: Fix artifact handling for GitHub Actions v4)
       with:
-        name: NuGet
+        name: NuGet-OpenSans
         path: nuget\OpenSans\Uno.Fonts.OpenSans\artifacts
 
   publish:
@@ -160,20 +176,30 @@ jobs:
     runs-on: windows-latest
     needs: [build_fluent, build_roboto, build_opensans]
     steps:
-      - name: Checkout
-        uses: actions/checkout@v2
+    - name: Checkout
+      uses: actions/checkout@v2
 
+<<<<<<< HEAD
       - name: Download Artifacts
         uses: actions/download-artifact@v2
         with:
           name: NuGet
           path: artifacts
+=======
+    - name: Download Fluent Artifacts  # Adjusted to download specific artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: NuGet-Fluent
+        path: artifacts/fluent
+>>>>>>> 28b88be (ci: Fix artifact handling for GitHub Actions v4)
 
-      - name: Setup .NET SDK
-        uses: actions/setup-dotnet@v1
-        with:
-          dotnet-version: '3.1.x'
+    - name: Download Roboto Artifacts  # Adjusted to download specific artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: NuGet-Roboto
+        path: artifacts/roboto
 
+<<<<<<< HEAD
       - name: Setup SignClient
         run: |
           dotnet tool install --tool-path build SignClient
@@ -187,8 +213,34 @@ jobs:
         with:
           name: NuGet-Signed
           path: ./artifacts
+=======
+    - name: Download OpenSans Artifacts  # Adjusted to download specific artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: NuGet-OpenSans
+        path: artifacts/opensans
+>>>>>>> 28b88be (ci: Fix artifact handling for GitHub Actions v4)
 
-      - name: NuGet Push
-        shell: pwsh
-        run: |
-          dotnet nuget push artifacts\*.nupkg -s https://api.nuget.org/v3/index.json -k ${{ secrets.NUGET_ORG_API_KEY }}        
+    - name: Setup .NET SDK
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '3.1.x'
+
+    - name: Setup SignClient
+      run: |
+        dotnet tool install --tool-path build SignClient
+    - name: SignClient
+      shell: pwsh
+      run: |
+        build\SignClient sign -i artifacts\*.nupkg -c build\SignClient.json -r "${{ secrets.UNO_PLATFORM_CODESIGN_USERNAME }}" -s "${{ secrets.UNO_PLATFORM_CODESIGN_SECRET }}" -n "Uno.Check" -d "Uno.Check" -u "https://github.com/unoplatform/uno.check"
+      
+    - name: Upload Signed Artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: NuGet-Signed
+        path: ./artifacts
+
+    - name: NuGet Push
+      shell: pwsh
+      run: |
+        dotnet nuget push artifacts\*.nupkg -s https://api.nuget.org/v3/index.json -k ${{ secrets.NUGET_ORG_API_KEY }}