Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

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

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'

.github/workflows/publish-docker.yml

@@ -25,7 +25,7 @@ jobs:
     if: ${{ github.event.label.name == 'ok-to-image' }} || ${{ github.event.label.name == 'ok-to-🐳' }} || ${{ github.ref == 'refs/heads/main' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: docker/metadata-action@v4
         id: meta
         with:

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     name: test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'