Update peps/pep-0813.rst

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

Author: warsaw

peps/pep-0813.rst

@@ -26,8 +26,7 @@ versus the standard ``repr()`` built-in function.  Important use cases include p
 dictionaries and other complicated objects for debugging purposes.
 
 This PEP builds on the features of the module to provide more customization and user convenience.  It is also
-inspired by the `Rich library's pretty printing protocol
-<https://rich.readthedocs.io/en/latest/pretty.html#rich-repr-protocol>`_.
+inspired by the `Rich library's pretty printing protocol <rich-repr-protocol_>`_.
 
 
 Rationale