add timescale clarification

ericpaulsen · ericpaulsen · commit 058e67d767ae · 2021-04-08T12:28:54.000-05:00
diff --git a/setup/updating.md b/setup/updating.md
@@ -104,6 +104,9 @@ If this happens, we recommend uninstalling and reinstalling:
    cluster, and keep the housing namespace intact. It will not delete user
    environments or their associated volumes.
 
+   > `helm uninstall` will delete the timescale instance internal to the
+   > cluster. If you're using an external Postgres, it will not be affected.
+
    ```console
    helm uninstall --namespace coder coder
    ```
