Fix Ruff import ordering for CI

tests/apps/core/test_cache.py

@@ -1,14 +1,13 @@
 """Tests for core cache utilities"""
 
-from django.core.cache import cache
-from django.test import TestCase
-
 from apps.core.cache import (
     CacheManager,
     _build_cache_key,
     cache_method,
     cache_result,
 )
+from django.core.cache import cache
+from django.test import TestCase
 
 
 class CacheResultDecoratorTest(TestCase):