chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...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/ci.yml

@@ -22,7 +22,7 @@ jobs:
       docs: ${{ steps.filter.outputs.docs }}
       not-only-docs: ${{ steps.filter.outputs.not-only-docs }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: dorny/paths-filter@v3
         id: filter
         with:

.github/workflows/generate-allure-report.yml

@@ -24,7 +24,7 @@ jobs:
     name: Generate test reports
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Forge
         uses: input-output-hk/catalyst-forge/actions/install@ci/v1.9.0
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [generate-test-reports]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v4
         with:
@@ -80,7 +80,7 @@ jobs:
           ls ${{ env.ALLURE_REPORT_FOLDER }}
 
       - name: Checkout gh-pages
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: gh-pages
           path: gh-pages-dir
@@ -113,7 +113,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [generate-test-reports]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v4
         with: