Bump actions/checkout from 3 to 4

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
   build-js-event:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@v3
       with:
         node-version: latest
@@ -21,7 +21,7 @@ jobs:
   build-js-stripe:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@v3
       with:
         node-version: latest
@@ -35,5 +35,5 @@ jobs:
   build-jekyll:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/jekyll-build-pages@v1

.github/workflows/dependency-review.yml

@@ -15,6 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v3

.github/workflows/deploy.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Pages
         uses: actions/configure-pages@v3
       - run: npm ci