Merge pull request #19670 from edx/youngstrom/update-oep-2-link

Fix broken link to oep2 in openedx.yml

openedx.yaml

 # This file describes this Open edX repo, as described in OEP-2:
-# https://open-edx-proposals.readthedocs.io/en/latest/oeps/oep-0002.html#specification
+# https://open-edx-proposals.readthedocs.io/en/latest/oep-0002-bp-repo-metadata.html#specification
 
 nick: edx
 oeps: {}