fix: 🐛 Complete user update methods

CHANGELOG.md

@@ -34,6 +34,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#3102](https://github.com/Pycord-Development/pycord/pull/3102))
 - Fixed use of deprecated `float` type for `timeout=...` in `ws_connect()`.
   ([#3105](https://github.com/Pycord-Development/pycord/pull/3105))
+- Fixed the update of a user's `avatar_decoration` to now cause an `on_user_update`
+  event to fire. ([#3103](https://github.com/Pycord-Development/pycord/pull/3103))
 
 ### Deprecated
 

discord/member.py

@@ -474,6 +474,7 @@ def _update_inner_user(self, user: UserPayload) -> tuple[User, User] | None:
             u._public_flags,
             u.primary_guild,
             u._collectibles,
+            u._avatar_decoration,
         )
         # These keys seem to always be available
         if (
@@ -492,6 +493,7 @@ def _update_inner_user(self, user: UserPayload) -> tuple[User, User] | None:
             user.get("public_flags", 0),
             new_primary_guild,
             user.get("collectibles") or u._collectibles,
+            user.get("avatar_decoration_data"),
         )
         if original != modified:
             to_return = User._copy(self._user)
@@ -503,6 +505,7 @@ def _update_inner_user(self, user: UserPayload) -> tuple[User, User] | None:
                 u._public_flags,
                 u.primary_guild,
                 u._collectibles,
+                u._avatar_decoration,
             ) = modified
             # Signal to dispatch on_user_update
             return to_return, u