fix: change github lint error

Author: RustamovAkrom

apps/users/services.py

@@ -2,7 +2,7 @@
 from rest_framework_simplejwt.tokens import RefreshToken
 
 
-def generate_jwt_tokens(user) -> tuple[str, str]:
+def generate_jwt_tokens(user):
     refresh = RefreshToken.for_user(user)
     access_token = refresh.access_token
     access_token['user_id'] = user.id