Bump marcofranssen/setup-kubectl from 2.0.0 to 2.1.0

Bumps [marcofranssen/setup-kubectl](https://github.com/marcofranssen/setup-kubectl) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/marcofranssen/setup-kubectl/releases)
- [Commits](marcofranssen/setup-kubectl@v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: marcofranssen/setup-kubectl
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/e2e-test.yml

@@ -27,7 +27,7 @@ jobs:
           tags: |
             postgres-operator:build
       - name: Install kubectl & krew
-        uses: marcofranssen/setup-kubectl@v2.0.0
+        uses: marcofranssen/setup-kubectl@v2.1.0
         with:
           enablePlugins: true
       - name: Install KUTTL