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/tag.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go

.github/workflows/tests.yaml

@@ -22,7 +22,7 @@ jobs:
   get_version_matrix:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - id: get_version_matrix
         shell: bash
         run: scripts/get-version-matrix.sh
@@ -51,7 +51,7 @@ jobs:
         terraform_version:  ${{ fromJson(needs.get_version_matrix.outputs.terraform_versions) }}
         k8s_version:  ${{ fromJson(needs.get_version_matrix.outputs.k8s_versions) }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Go
         uses: actions/setup-go@v3
         with: