Bump actions/checkout from 2 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  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

@@ -17,7 +17,7 @@ jobs:
           - "0.12.5"
           - "0.12.6.1"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Login to ghcr.io

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
           - "0.12.5"
           - "0.12.6.1"
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
       - name: Install dependencies
         run: |
           pip install tox