Revert update in kubernetes

Signed-off-by: thepetk <[email protected]>

Author: thepetk

.github/workflows/ci.yaml

@@ -132,7 +132,7 @@ jobs:
         uses: manusa/actions-setup-minikube@3856c6fa039819f1c8e7e248b1fc5a8564e354c9 # v2.9.0
         with:
           minikube version: 'v1.31.2'
-          kubernetes version: 'v1.28.1'
+          kubernetes version: 'v1.21.0'
           driver: 'docker'
           github token: ${{ secrets.GITHUB_TOKEN }}
           start args: '--addons=ingress --memory 4096 --cpus 2'