chore(deps): bump FairwindsOps/pluto from 5.20.3 to 5.21.0

Bumps [FairwindsOps/pluto](https://github.com/fairwindsops/pluto) from 5.20.3 to 5.21.0.
- [Release notes](https://github.com/fairwindsops/pluto/releases)
- [Changelog](https://github.com/FairwindsOps/pluto/blob/master/.goreleaser.yml)
- [Commits](FairwindsOps/pluto@v5.20.3...v5.21.0)

---
updated-dependencies:
- dependency-name: FairwindsOps/pluto
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/k8s-apis-deprecation.yml

@@ -39,7 +39,7 @@ jobs:
 
       - name: "🛠️ Setup Pluto"
         # Pluto in the docs suggest to use master but would be better to tag a release version
-        uses: FairwindsOps/pluto/github-action@v5.20.3
+        uses: FairwindsOps/pluto/github-action@v5.21.0
 
       - name: "🔍 Inspecting ${{ matrix.charts_name }} against k8s ${{ matrix.k8s_version }}"
         id: inspecting