nextcloud: add google import and event update notification extension

basic/overrides/stackspin-nextcloud-override.yaml

@@ -80,5 +80,8 @@ data:
         enabled: true
       - name: workflow_ocr
         enabled: true
-      - name: flow_notifications
+      # Testing
+      - name: event_update_notification
+        enabled: true
+      - name: integration_google
         enabled: true