Update dependency tox to v4.50.3

Author: renovate[bot]

pyproject.toml

@@ -30,7 +30,7 @@ dev = [
     "flake8==7.3.0",
     "werkzeug==3.1.6",
     "pytest-httpserver==1.1.5",
-    "tox==4.50.1",
+    "tox==4.50.3",
     "pytest-cov==7.0.0",
     "types-requests>=2.32.0,<3",
     "isort==7.0.0",