PEP 503 & PEP 691: Link to PyPA specifications (#4558)

Signed-off-by: William Woodruff <[email protected]>

Author: woodruffw

peps/pep-0503.rst

@@ -10,6 +10,8 @@ Created: 04-Sep-2015
 Post-History: 04-Sep-2015
 Resolution: https://mail.python.org/pipermail/distutils-sig/2015-September/026899.html
 
+.. canonical-pypa-spec:: :ref:`packaging:simple-repository-api`
+
 
 Abstract
 ========

peps/pep-0691.rst

@@ -13,6 +13,8 @@ Created: 04-May-2022
 Post-History: `05-May-2022 <https://discuss.python.org/t/pep-691-json-based-simple-api-for-python-package-indexes/15553>`__
 Resolution: https://discuss.python.org/t/pep-691-json-based-simple-api-for-python-package-indexes/15553/70
 
+.. canonical-pypa-spec:: :ref:`packaging:simple-repository-api`
+
 
 Abstract
 ========