Switch to a non-deprecated method

Author: mdmintz

seleniumbase/undetected/__init__.py

@@ -198,7 +198,7 @@ def __init__(
             try:
                 import locale
 
-                language = locale.getdefaultlocale()[0].replace("_", "-")
+                language = locale.getlocale()[0].replace("_", "-")
             except Exception:
                 pass
             if not language: