docs: update gravel/session-desktop capabilities

for-sogops.md

@@ -92,6 +92,8 @@ Existing lists created by the community may serve as a basis for your profanity
 
   - `Ban User from Server` and `Unban User from Server` options allow **global** moderators to ban a user from all Communities on a given server.
 
+  - `Edit Permissions` allows admins to set default permissions for a given Community.
+
   - **Warning**: To receive updates, you will need to compile new versions of the fork. The fork is maintained for personal use and may fall behind on security fixes.
 
 ## Customization