Bump actions/checkout from 5 to 6 in the github-actions group

Bumps the github-actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `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
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     outputs:
       sha256: ${{ steps.checksums.outputs.sha256 }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0 # deep fetch for better sonarcloud analysis
       - uses: actions/setup-java@v5
@@ -75,7 +75,7 @@ jobs:
     needs: [build]
     if: github.repository_owner == 'cryptomator' && (startsWith(github.ref, 'refs/tags/') || contains(github.event.head_commit.message, '[deploy]'))
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
@@ -111,7 +111,7 @@ jobs:
     needs: [build]
     if: github.repository_owner == 'cryptomator' && (startsWith(github.ref, 'refs/tags/') || contains(github.event.head_commit.message, '[deploy]'))
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
           java-version: ${{ env.JAVA_VERSION }}

.github/workflows/codeql-analysis.yml

@@ -19,7 +19,7 @@ jobs:
       security-events: write
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 2
     - name: Set up Java