Add outbound hooks

chat/matrix/bridges.markdown

@@ -9,10 +9,18 @@ New bridges and updates will be posted in this room.
 The source code for the bridge is available at [matrix-hookshot](https://github.com/matrix-org/matrix-hookshot) on Github.
 Currently enabled features:
 
-- Generic webhooks
+- Generic webhooks (inbound, outbound)
+
+For a list of commands see the help:
+
+```
+!hookshot help
+```
 
 ### Generic webhooks
 
+This section covers inbound webhhoks.
+
 Base URL: `https://hookshot.mbot.ethz.ch/webhook/<hook>`
 
 1. Invite [hookshot](https://m.ethz.ch/#/@hookshot:mbot.ethz.ch) (`@hookshot:mbot.ethz.ch`) to your **unencrypted** room
@@ -36,7 +44,7 @@ Example json payloads:
 Example using [httpie](https://httpie.io/):
 
 ```bash
-http POST "<url>" <<<'<payload>'
+http PUT "<url>" <<<'<payload>'
 ```
 
 Example using `curl`:
@@ -52,6 +60,14 @@ In the room where webhooks were configured (not admin room):
 - List webhooks: `!hookshot webhook list`
 - Remove webhook: `!hookshot webhook remove <name>`
 
+### Outbound webhhoks
+
+**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).
+
+
 ## Webhook API (Grafana, Slack)
 
 Base URL: `https://webhooks.mbot.ethz.ch/webhook/<api>/<hook>`