(maint): Bump actions/checkout from 5 to 6

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/build.yml

@@ -35,7 +35,7 @@ jobs:
       COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
     steps:
       - name: Checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/codeql-analysis.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
 

.github/workflows/publishDocs.yml

@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@v5 #https://github.com/actions/checkout
+      uses: actions/checkout@v6 #https://github.com/actions/checkout
       with:
         fetch-depth: 0 # GitVersion is somewhat irritated when fetch-depth is "1"....
         ref: ${{ github.event.ref }}

.github/workflows/release-notes.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout the requested branch
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Cache Tools