Bump actions/checkout from 3 to 4 (#646)

* 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)
- [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]>

* Update lint.yml

Signed-off-by: Luca Comellini <[email protected]>

---------

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

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -58,9 +58,9 @@ jobs:
 
   yaml-lint:
     name: YAML lint
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: Install yamllint
         run: pip install yamllint