Bump actions/checkout from 5 to 6 in /.github/workflows

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]>

Author: dependabot[bot]

.github/workflows/dependabot.yml

@@ -9,7 +9,7 @@ jobs:
   Dependabot:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install perquisite
         run: |
           pip3 install dockerfile-parse

.github/workflows/docker-image.yml

@@ -16,7 +16,7 @@ jobs:
       push_matrix: ${{ steps.set-matrix.outputs.push_matrix }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Setup Matrix-Jobs
@@ -64,7 +64,7 @@ jobs:
         ${{ insert }}: ${{ fromJson(needs.Setup.outputs.build_matrix) }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Login to Docker Hub
       if: github.event_name == 'push'
@@ -157,7 +157,7 @@ jobs:
         ${{ insert }}: ${{ fromJson(needs.Setup.outputs.push_matrix) }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Login to Docker Hub
       uses: docker/login-action@v3