Create outbound hooks only in throwaway rooms

chat/matrix/bridges.markdown

@@ -64,8 +64,8 @@ In the room where webhooks were configured (not admin room):
 
 **Experimental, deleting outbound hooks is not implemented. Use it wisely!**
 
-Use similar steps as for inbound webhooks. See `!hookshot help` for usage
-and refer to the [docs](https://matrix-org.github.io/matrix-hookshot/latest/setup/webhooks.html#outbound-webhooks).
+1. Create a new unencrypted room
+2. Use similar steps as for inbound webhooks. See `!hookshot help` for usage and refer to the [docs](https://matrix-org.github.io/matrix-hookshot/latest/setup/webhooks.html#outbound-webhooks).
 
 
 ## Webhook API (Grafana, Slack)