Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/fragment-in-pr.yml

@@ -8,7 +8,7 @@ jobs:
     if: "!contains(github.event.pull_request.labels.*.name, 'skip-changelog') && !contains(github.event.pull_request.labels.*.name, 'backport')"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-go@v3
       with:
         go-version-file: .go-version

.github/workflows/golangci-lint.yml

@@ -18,7 +18,7 @@ jobs:
     name: lint
     runs-on: ${{  matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-go@v3
         with:

.github/workflows/post-dependabot.yml

@@ -16,7 +16,7 @@ jobs:
       contents: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-go@v4
         with: