ci: bump lumapps/github-actions-validator from 1 to 2

Bumps [lumapps/github-actions-validator](https://github.com/lumapps/github-actions-validator) from 1 to 2.
- [Release notes](https://github.com/lumapps/github-actions-validator/releases)
- [Commits](lumapps/github-actions-validator@v1...v2)

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

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

Author: dependabot[bot]

.github/workflows/github-actions-validator.yml

@@ -14,4 +14,4 @@
           runs-on: ubuntu-latest
           steps:
               - uses: actions/checkout@v3
-              - uses: lumapps/github-actions-validator@v1
+              - uses: lumapps/github-actions-validator@v2