Bump the all-actions group with 3 updates

Bumps the all-actions group with 3 updates: [actions/checkout](https://github.com/actions/checkout), [simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_phplinter.yml](https://github.com/simplesamlphp/simplesamlphp-test-framework) and [simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_linter.yml](https://github.com/simplesamlphp/simplesamlphp-test-framework).


Updates `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)

Updates `simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_phplinter.yml` from 1.10.4 to 1.10.5
- [Commits](simplesamlphp/simplesamlphp-test-framework@v1.10.4...v1.10.5)

Updates `simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_linter.yml` from 1.10.4 to 1.10.5
- [Commits](simplesamlphp/simplesamlphp-test-framework@v1.10.4...v1.10.5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all-actions
- dependency-name: simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_phplinter.yml
  dependency-version: 1.10.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-actions
- dependency-name: simplesamlphp/simplesamlphp-test-framework/.github/workflows/reusable_linter.yml
  dependency-version: 1.10.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/documentation.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Lint markdown files
         uses: nosborn/github-action-markdown-cli@v3

.github/workflows/php.yml

@@ -21,7 +21,7 @@ jobs:
       matrix:
         php-version: ['8.1', '8.2', '8.3', '8.4']
 
-    uses: simplesamlphp/simplesamlphp-test-framework/.github/workflows/[email protected].4
+    uses: simplesamlphp/simplesamlphp-test-framework/.github/workflows/[email protected].5
     with:
       php-version: ${{ matrix.php-version }}
 
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
 
-    uses: simplesamlphp/simplesamlphp-test-framework/.github/workflows/[email protected].4
+    uses: simplesamlphp/simplesamlphp-test-framework/.github/workflows/[email protected].5
     with:
       enable_eslinter: false
       enable_jsonlinter: true
@@ -70,7 +70,7 @@ jobs:
           git config --global core.autocrlf false
           git config --global core.eol lf
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Get composer cache directory
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
@@ -133,7 +133,7 @@ jobs:
           git config --global core.autocrlf false
           git config --global core.eol lf
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Get composer cache directory
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$env:GITHUB_ENV"
@@ -170,7 +170,7 @@ jobs:
       - name: Setup problem matchers for PHP
         run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Get composer cache directory
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
@@ -224,7 +224,7 @@ jobs:
       - name: Setup problem matchers for PHP
         run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Get composer cache directory
         run: echo COMPOSER_CACHE="$(composer config cache-files-dir)" >> "$GITHUB_ENV"
@@ -253,7 +253,7 @@ jobs:
     runs-on: [ubuntu-latest]
     needs: [unit-tests-linux]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v6
         with: