Update pytest-asyncio to 0.26.0 (home-assistant#141365)

Author: cdce8p

requirements_test.txt

@@ -18,7 +18,7 @@ pydantic==2.10.6
 pylint==3.3.6
 pylint-per-file-ignores==1.4.0
 pipdeptree==2.25.1
-pytest-asyncio==0.25.3
+pytest-asyncio==0.26.0
 pytest-aiohttp==1.1.0
 pytest-cov==6.0.0
 pytest-freezer==0.4.9