test: add pytest mark to cache context test

Author: dylan.min

tests/general/test_cache_context.py

@@ -1,7 +1,9 @@
 import asyncio
+import pytest
 from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig, CacheMode
 from playwright.async_api import Page, BrowserContext
 
+@pytest.mark.asyncio
 async def test_reuse_context_by_config():
     # We will store each context ID in these maps to confirm reuse
     context_ids_for_A = []