Merge branch 'update-helm-release-api-in-base' into 'master'

update helm release API version in base

Closes #2271

See merge request !4907

base/helmrelease.yaml

-apiVersion: helm.toolkit.fluxcd.io/v2beta2
+apiVersion: helm.toolkit.fluxcd.io/v2
 kind: HelmRelease
 metadata:
   name: bigbang

base/kustomization.yaml

@@ -34,4 +34,4 @@ secretGenerator:
   - name: environment-bb
     behavior: create
     literals:
-    - values.yaml=
\ No newline at end of file
+    - values.yaml=