Add configmap rules for templateFrom

https://github.com/external-secrets/external-secrets/issues/179

deploy/charts/external-secrets/templates/rbac.yaml

@@ -32,6 +32,14 @@ rules:
     - "get"
     - "list"
     - "watch"
+  - apiGroups:
+    - ""
+    resources:
+    - "configmaps"
+    verbs:
+    - "get"
+    - "list"
+    - "watch"
   - apiGroups:
     - ""
     resources: