Merge pull request #2877 from kfirstri/fix-docs-hooks

fix(helm) right syntax is helm.sh/hook-delete-policy

docs/charts_hooks.md

@@ -122,7 +122,7 @@ metadata:
     # job is considered part of the release.
     "helm.sh/hook": post-install
     "helm.sh/hook-weight": "-5"
-    "helm/hook-delete-policy": hook-succeeded
+    "helm.sh/hook-delete-policy": hook-succeeded
 spec:
   template:
     metadata: