Kubernetes topolvm: fix pv removal doc (#1141)

Add necessary 5th step

Author: YuryHrytsuk

charts/topolvm/README.md

@@ -16,9 +16,10 @@ Source: https://github.com/topolvm/topolvm/blob/topolvm-chart-v15.5.5/docs/getti
 
 ## Deleting PV(C)s with `retain` reclaim policy
 1. Delete release (e.g. helm uninstall -n test test)
-2. Find LogicalVolume CR (`kubectl get logicalvolumes.topolvm.io`
+2. Find LogicalVolume CR (`kubectl get logicalvolumes.topolvm.io`)
 3. Delete LogicalVolume CR (`kubectl delete logicalvolumes.topolvm.io <lv-name>`)
 4. Delete PV (`kubectl delete PV <pv-name>`)
+5. Remove PV's finalizers (`kubectl patch pv <pv-name> -p '{"metadata":{"finalizers":null}}'`)
 
 ## Backup / Snapshotting
 1. Only possible while using thin provisioning