add PR 676 link for RFC

Author: ameowlia

toc/rfc/rfc-draft-toc-stand-in-for-wg-lead.md

@@ -4,7 +4,7 @@
 - Start Date: 2023-08-28
 - Author(s): Amelia Downs
 - Status: Draft <!-- Acceptable values: Draft, Approved, On Hold, Superseded -->
-- RFC Pull Request: (fill in with PR link after you submit it)
+- RFC Pull Request: https://github.com/cloudfoundry/community/pull/676
 
 
 ## Summary