Bump actions/checkout from 3 to 4 (#8)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

action.yml

@@ -35,7 +35,7 @@ runs:
     - uses: imranismail/setup-kustomize@v2
 
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         token: ${{ inputs.token }}
         ref: ${{ inputs.branch }}
@@ -69,7 +69,7 @@ runs:
             This PR is auto-generated.
         labels: ${{ inputs.labels }}
 
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         path: ${{ github.repository }}
         fetch-depth: 0