Update mypy-dev to 1.17.0a4 (home-assistant#147939)

Author: cdce8p

requirements_test.txt

@@ -13,7 +13,7 @@ freezegun==1.5.2
 go2rtc-client==0.2.1
 license-expression==30.4.1
 mock-open==1.4.0
-mypy-dev==1.17.0a2
+mypy-dev==1.17.0a4
 pre-commit==4.2.0
 pydantic==2.11.7
 pylint==3.3.7