Fix incorrect use of re function in tests (#12213)

Author: hauntsaninja

news/732404DE-8011-4146-8CAD-85D7756D88A6.trivial.rst

@@ -1187,7 +1187,7 @@ def create_basic_wheel_for_package(
 
     # Fix wheel distribution name by replacing runs of non-alphanumeric
     # characters with an underscore _ as per PEP 491
-    name = re.sub(r"[^\w\d.]+", "_", name, re.UNICODE)
+    name = re.sub(r"[^\w\d.]+", "_", name)
     archive_name = f"{name}-{version}-py2.py3-none-any.whl"
     archive_path = script.scratch_path / archive_name