[Tei-council] time to announce new release

Martina — Nick and I have finished the GitHub and SourceForge releases of 4.2.2 and 7.51.2. (Nick is still working on the Debian packages; Martin & Peter will do oXygen next week.) So it is time for step 22, which I think is up to you or Hugh, right? Update the list of previous releases of P5, which is found at https://tei-c.org/guidelines/p5/#section-2.If you have editing privileges on the TEI WordPress on tei-c.org, add the new release to the top of the release table. If not, ask one of the other Council members who does (currently Martina Scholger and Hugh Cayless) to make the change.