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] <[email protected]>

.github/workflows/documentation.yml

@@ -5,7 +5,7 @@ jobs:
   docs:
     runs-on: ubuntu-latest 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.ref }}
     - name: Render terraform docs inside the README.md and push changes back to PR branch

.github/workflows/tfsec.yml

@@ -16,7 +16,7 @@ jobs:
       security-events: write
     steps:
       - name: Clone repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Run tfsec
         uses: aquasecurity/tfsec-sarif-action@21ded20e8ca120cd9d3d6ab04ef746477542a608
         with: