chore: make ruff exclude more specific

Author: abn

pyproject.toml

@@ -93,7 +93,10 @@ build-backend = "poetry.core.masonry.api"
 extend-exclude = [
     "docs/*",
     # External to the project's coding standards
-    "tests/**/fixtures/*",
+    "tests/fixtures/git/*",
+    "tests/fixtures/project_with_setup*/*",
+    "tests/masonry/builders/fixtures/pep_561_stub_only*/*",
+    "tests/utils/fixtures/setups/*",
 ]
 fix = true
 line-length = 88