ci: Use new semgrep configuration

.github/workflows/semgrep.yml

@@ -1,4 +1,5 @@
 on:
+  workflow_dispatch: {}
   pull_request_target:
     branches:
       - main
@@ -13,14 +14,25 @@ on:
 name: Semgrep
 jobs:
   semgrep:
-    name: Scan
+    # User definable name of this GitHub Actions job.
+    name: semgrep/ci
+    # If you are self-hosting, change the following `runs-on` value:
     runs-on: ubuntu-latest
+
+    container:
+      # A Docker image with Semgrep installed. Do not change this.
+      image: returntocorp/semgrep
+
+    # Skip any PR created by dependabot to avoid permission issues:
+    if: (github.actor != 'dependabot[bot]')
+
     steps:
-    - uses: actions/checkout@v4
-    - uses: returntocorp/semgrep-action@v1
-      with:
-        auditOn: push
-        publishToken: ${{ secrets.SEMGREP_APP_TOKEN }}
-        publishDeployment: 420
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      # Fetch project source with GitHub Actions Checkout.
+      - uses: actions/checkout@v3
+      # Run the "semgrep ci" command on the command line of the docker image.
+      - run: semgrep ci
+        env:
+          # Connect to Semgrep Cloud Platform through your SEMGREP_APP_TOKEN.
+          # Generate a token from Semgrep Cloud Platform > Settings
+          # and add it to your GitHub secrets.
+          SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}