Revert kcp-operator helm chart to v0.4.1 (#61)

Author: ntnn

.github/workflows/ocm.yaml

@@ -47,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       # Third-party dependency versions
-      KCP_OPERATOR_CHART_VERSION: "0.5.1"
+      KCP_OPERATOR_CHART_VERSION: "0.4.1"
       KCP_OPERATOR_IMAGE_VERSION: "v0.5.1"
       KCP_VERSION: "v0.30.0"
       INIT_AGENT_CHART_VERSION: "0.2.0"