bpo-31865: Fix a couple of typos in the html.unescape() docs. (GH-9664)

(cherry picked from commit 30534cc)

Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

Author: miss-islington

Doc/library/html.rst

@@ -24,7 +24,7 @@ This module defines utilities to manipulate HTML.
 .. function:: unescape(s)
 
    Convert all named and numeric character references (e.g. ``>``,
-   ``>``, ``&x3e;``) in the string *s* to the corresponding unicode
+   ``>``, ``>``) in the string *s* to the corresponding Unicode
    characters.  This function uses the rules defined by the HTML 5 standard
    for both valid and invalid character references, and the :data:`list of
    HTML 5 named character references <html.entities.html5>`.