Bump actions/checkout from 4 to 6

.github/workflows/asciidoctor-ghpages.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: asciidoctor-ghpages
         uses: manoelcampos/asciidoctor-ghpages-action@v2

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       # Checkout repo using https://github.com/marketplace/actions/checkout
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4

.github/workflows/nightly-tests.yml

@@ -16,7 +16,7 @@ jobs:
       should_run: ${{ steps.check.outputs.changed }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch all history to compare commits
 
@@ -74,7 +74,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Authenticate to Google Cloud
         uses: google-github-actions/auth@v1

.github/workflows/release.yml

@@ -6,7 +6,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Import GPG Key
         uses: crazy-max/ghaction-import-gpg@v5
         with:

.github/workflows/snyk-scan.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Run Snyk to check for vulnerabilities
         uses: snyk/actions/maven@cdb760004ba9ea4d525f2e043745dfe85bb9077e