chore: 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] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
             freebsd_id: freebsd15
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup FreeBSD build VM
         run: |
           /usr/local/bin/VBoxManage controlvm ${{ matrix.freebsd_version }} poweroff || true
@@ -61,7 +61,7 @@ jobs:
             freebsd_id: freebsd14
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v6
         with:

.github/workflows/quality.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         php-version: [ "8.2" ]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: "Setup PHP ${{ matrix.php-version }}"
         uses: shivammathur/setup-php@v2
         with:
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [lint_php]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Lint OpenAPI spec
         uses: vaibhav-jain/spectral-action/@v2.6
         with:
@@ -38,7 +38,7 @@ jobs:
       matrix:
         python-version: ["3.10", "3.11"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
       with:

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
             pfsense_version: 24.03
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup FreeBSD build VM
         run: |
           /usr/local/bin/VBoxManage controlvm ${{ matrix.freebsd_version }} poweroff || true