zwiebelbot doesn't talk with the new gitlab server

this works:

09:51:56 <anarcat> gitlabtpo:tpo/tpa/gitlab#1
09:51:57 -zwiebelbot:#tpo-admin- gitlabtpo:tpo/tpa/gitlab#1: legacy issues are writable and should not be - https://gitlab.torproject.org/tpo/tpa/gitlab/-/issues/1

but this doesn't:

09:50:34 <anarcat> tpo/tpa/gitlab#1

... while it should.

it also seems like #NNN still talks to Trac while it should be talking to legacy#NNN instead.

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