Fixed mongodb minor typo (#112)

charts/mongodb/latest/questions.yml

@@ -102,7 +102,7 @@ questions:
     default: ""
     description: "If not empty, uses the specified existing PVC instead of creating new one"
     type: pvc
-    label: Uses Existing Persistent Volume Cliam for LocalStorage
+    label: Uses Existing Persistent Volume Claim for LocalStorage
     show_if: "persistence.enabled=true&&replicaSet.enabled=false"
 - variable: service.type
   default: "ClusterIP"