Update #comment:n links to point to GitLab equivalents
The metrics timeline has many links of the form [comment](https://bugs.torproject.org/27723#comment:4)
. The transition to GitLab unfortunately did not preserve #comment:n
anchors. Links like these need to be rewritten in the form
https://gitlab.torproject.org/legacy/trac/-/issues/27723#note_2298588
or even
https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issues/27723#note_2601557
or arguably
https://bugs.torproject.org/27723#note_2298588
which will probably require scraping the GitLab page and counting comments to recover the anchor id of the n
th comment.
For comparison, the link used to redirect to https://trac.torproject.org/projects/tor/ticket/27723#comment:4
.