Fix a small typo in the arguments of simple_update in update_remote_profile_cache (#7511)

changelog.d/7511.bugfix

@@ -0,0 +1 @@
+Fix a long-standing bug that broke the update remote profile background process.

synapse/storage/data_stores/main/profile.py

@@ -110,7 +110,7 @@ class ProfileStore(ProfileWorkerStore):
         return self.db.simple_update(
             table="remote_profile_cache",
             keyvalues={"user_id": user_id},
-            values={
+            updatevalues={
                 "displayname": displayname,
                 "avatar_url": avatar_url,
                 "last_check": self._clock.time_msec(),