Bump ruff from 0.4.2 to 0.4.3 (#1454)

requirements/testing.txt

@@ -5,7 +5,7 @@ pytest==8.2.0
 pytest-asyncio==0.21.1
 pytest-cov==5.0.0
 pytest-icdiff==0.9
-ruff==0.4.2
+ruff==0.4.3
 setuptools==69.5.1
 tox==4.15.0
 tox-gh-actions==3.2.0