PEP 684: Fix Discussions-To (#2395)

Author: CAM-Gerlach

pep-0684.rst

@@ -1,7 +1,7 @@
 PEP: 684
 Title: A Per-Interpreter GIL
 Author: Eric Snow <ericsnowcurrently@gmail.com>
-Discussions-To: `python-dev@python.org <https://mail.python.org/archives/list/python-dev@python.org/thread/CF7B7FMACFYDAHU6NPBEVEY6TOSGICXU/>`__
+Discussions-To: https://mail.python.org/archives/list/python-dev@python.org/thread/CF7B7FMACFYDAHU6NPBEVEY6TOSGICXU/
 Status: Draft
 Type: Standards Track
 Content-Type: text/x-rst