try harder to make linters happier

They don't seem to like GitLab links to wiki pages. :-(

See: https://gitlab.torproject.org/tpo/tpa/wiki-replica/-/jobs/820082

policy/tpa-rfc-77-puppet-merge.md

@@ -8,7 +8,7 @@ status: proposed
 
 # Background
 
-[[TPA-RFC-73|/policy/tpa-rfc-73-tails-infra-merge-roadmap]] identified Puppet as a bottleneck for the infra merge, as it blocks keeping, migrating and merging several other services. Merging codebases and ditching one of the Puppet servers is a complex move, so in this document we detail how that will be done.
+[TPA-RFC-73](/tpo/tpa/team/-/wikis/policy/tpa-rfc-73-tails-infra-merge-roadmap) identified Puppet as a bottleneck for the infra merge, as it blocks keeping, migrating and merging several other services. Merging codebases and ditching one of the Puppet servers is a complex move, so in this document we detail how that will be done.
 
 # Proposal