Bump actions/checkout from 3 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...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>

Author: dependabot[bot]

.github/workflows/auto-clang-format.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
     - uses: DoozyX/clang-format-lint-action@v0.20
       with:
         source: '.'

.github/workflows/ci.yml

@@ -126,7 +126,7 @@ jobs:
           script: |
             core.setFailed('There is a mismatch between configured llvm compiler and clang-tidy version chosen')
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
 
       - name: Setup Cache
         uses: ./.github/actions/setup_cache

.github/workflows/codeql-analysis.yml

@@ -48,7 +48,7 @@ jobs:
 
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
 
     - name: Setup Cache
       uses: ./.github/actions/setup_cache

.github/workflows/template-janitor.yml

@@ -34,7 +34,7 @@ jobs:
           - OFF
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
 
       - name: Setup Cache
         uses: ./.github/actions/setup_cache
@@ -163,7 +163,7 @@ jobs:
           - ON
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
 
       - name: Setup Cache
         uses: ./.github/actions/setup_cache