build: bump actions/checkout from 5 to 6 (#517)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # Validate wrapper
       - name: Gradle Wrapper Validation

.github/workflows/publish-release.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract Tag Name
         uses: olegtarasov/get-tag@v2.1
@@ -64,7 +64,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract Tag Name
         uses: olegtarasov/get-tag@v2.1

.github/workflows/sonarcloud.yml

@@ -23,7 +23,7 @@ jobs:
 
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         if: ${{ env.SONAR_TOKEN != null }}
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis

.github/workflows/tests.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # Validate wrapper
       - name: Gradle Wrapper Validation

.github/workflows/verify.yml

@@ -19,7 +19,7 @@ jobs:
 
       # Check out current repository
       - name: Fetch Sources
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # Set up Java environment for the next steps
       - name: Setup Java