fix: adjust utility test function to properly output relative paths not absolute

Author: 56kyle

tests/util.py

@@ -6,4 +6,4 @@
 
 def templates_matching(pattern: str) -> list[Path]:
     """Return a list of relative file paths matching the given pattern."""
-    return list(COOKIECUTTER_FOLDER.glob(pattern))
+    return [path.relative_to(COOKIECUTTER_FOLDER) for path in COOKIECUTTER_FOLDER.glob(pattern)]