Bump actions/checkout from 4.1.4 to 4.1.6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.4 to 4.1.6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.4...v4.1.6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/e2e.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
 
-    - uses: actions/[email protected].4
+    - uses: actions/[email protected].6
 
     - name: start backend containers
       run: docker compose up -d backend populate

.github/workflows/gradle.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
 
-    - uses: actions/[email protected].4
+    - uses: actions/[email protected].6
 
     - name: install xmllint
       run: sudo apt update && sudo apt-get install --no-install-recommends -y libxml2-utils
@@ -40,7 +40,7 @@ jobs:
     steps:
 
     - name: checkout code
-      uses: actions/[email protected].4
+      uses: actions/[email protected].6
 
     - name: set up jdk
       uses: actions/[email protected]

.github/workflows/submit_dependencies.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/[email protected].4
+      - uses: actions/[email protected].6
 
       - uses: actions/[email protected]
         with: