DOC: Upgrade docs fix (#1587)

Author: dheeth

docs/setup/upgrade/devtron-upgrade-0.3.x-0.4.x.md

@@ -21,6 +21,8 @@ RELEASE_NAME=devtron
 ### 3. Annotate all the Devtron resources
 
 ```bash
+kubectl -n devtroncd label all --all "app.kubernetes.io/managed-by=Helm"
+kubectl -n devtroncd annotate all --all "meta.helm.sh/release-name=$RELEASE_NAME" "meta.helm.sh/release-namespace=devtroncd"
 kubectl -n devtroncd label secret --all "app.kubernetes.io/managed-by=Helm"
 kubectl -n devtroncd annotate secret --all "meta.helm.sh/release-name=$RELEASE_NAME" "meta.helm.sh/release-namespace=devtroncd"
 kubectl -n devtroncd label cm --all "app.kubernetes.io/managed-by=Helm"