Update Doc/library/stdtypes.rst

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: adorilson

Doc/library/stdtypes.rst

@@ -1998,7 +1998,7 @@ expression support in the :mod:`re` module).
       False
       >>> 'acommomword'.isalpha()
       True
-      >>> 'µ'.isalpha()  # non-ascii characters can be considered alphabetical too
+      >>> 'µ'.isalpha()  # non-ASCII characters can be considered alphabetical too
       True
 
    See :ref:`unicode-properties`.