Add matrix admin_users and other notes on matrix bridges and truste…

…d keys (#282)

* automatically generate a passkey.pem for placeholder for matrix hookshot bridge

* add admin_users list for matrix

* update docs for matrix admin users

* update lock file to upgrade google-auth

docs/k8s_apps/matrix.md

@@ -92,7 +92,7 @@ apps:
             ed25519:auto: abcdefghijklmnopqrstuvwxyzabcdefghijklmopqr
 ```
 
-The trusted_key_servers option currently displays in the TUI, but is not editable via the TUI yet.
+The trusted_key_servers option currently displays in the TUI, but is not editable via the TUI yet. See: [#269](https://github.com/small-hack/smol-k8s-lab/issues/269)
 
 
 #### Sensitive values
@@ -247,6 +247,10 @@ apps:
         federation_hostname: 'chat-federation.beepboopfordogsnoots.city'
         # email for of the admin user
         admin_email: '[email protected]'
+        # list of admin users for bridges, the hostnames will be appended automatically
+        admin_users:
+          - notadog
+          - realcat
         # enable signing key backups
         signing_key_pvc_enabled: 'true'
         # size of signing key pvc storage