[Glitch] Fix non-grouped notifications not loading on page load

Port 9ba7c90151 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/actions/notifications_migration.tsx

@@ -13,6 +13,6 @@ export const initializeNotifications = createAppAsyncThunk(
     ) as boolean;
 
     if (enableBeta) void dispatch(fetchNotifications());
-    else void dispatch(expandNotifications());
+    else void dispatch(expandNotifications({}));
   },
 );