add initial discussion footnote link

Author: rickeylev

peps/pep-0796.rst

@@ -218,6 +218,7 @@ Footnotes
 * `python-build-standalone <https://github.com/astral-sh/python-build-standalone>`__:
   A relocatable Python runtime.
 * `PoC for relative home in Python startup <https://github.com/python/cpython/compare/main...rickeylev:cpython:feat.relative.pyvenv.home>`__
+* `Python Ideas "Making venvs relocatable friendly" discussion <https://discuss.python.org/t/making-venvs-relocatable-friendly/96177>`__
 
 Rejected Ideas
 =====================