chore(deps): bump actions/checkout from 5 to 6 (#409)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/run-cosmos-tests.yaml

@@ -30,7 +30,7 @@ jobs:
       PG_CONNECTION_STRING: ${{ secrets.PG_CONNECTION_STRING }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
 
       - name: Cosmos PostgreSQL Tests (parallelizable)

.github/workflows/verify.yaml

@@ -26,15 +26,15 @@ jobs:
   Checkstyle:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: Run Checkstyle
         run: ./gradlew --refresh-dependencies checkstyleMain checkstyleTest checkstyleTestFixtures
 
   Unit-Tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: Run unit tests
         run: ./gradlew --refresh-dependencies test
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: Azure Storage Tests
         run: ./gradlew --refresh-dependencies test -DincludeTags="AzureStorageIntegrationTest"
@@ -62,7 +62,7 @@ jobs:
   #      contents: read
   #
   #    steps:
-  #      - uses: actions/checkout@v5
+  #      - uses: actions/checkout@v6
   #      - uses: eclipse-edc/.github/.github/actions/setup-build@main
   #
   #      - name: 'Az CLI login'
@@ -89,23 +89,23 @@ jobs:
   Component-Tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: Component Tests
         run: ./gradlew --refresh-dependencies -DincludeTags="ComponentTest"
 
   End-To-End-Tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: End to End Integration Tests
         run: ./gradlew --refresh-dependencies test -DincludeTags="EndToEndTest"
 
   API-Tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: eclipse-edc/.github/.github/actions/setup-build@main
       - name: Component Tests
         run: ./gradlew --refresh-dependencies test -DincludeTags="ApiTest"