fix(cinder-csi-plugin): describe what commonAnnotations do

Author: roehlc

charts/cinder-csi-plugin/values.yaml

@@ -204,5 +204,5 @@ priorityClassName: ""
 imagePullSecrets: []
 # - name: my-imagepull-secret
 
-# add annotations to all pods
+# add annotations to all pods, deployment, daemonset and podmonitor
 commonAnnotations: {}