Adds instructions to the Twenty Twenty-Two readme file for updating the comment block from the legacy version to the newer version introduced in WordPress 6.1.
As Twenty Twenty-Two supports WordPress version prior to 6.1, the legacy comment block is used by default.
Props desrosj, jeffpaul, joedolson, mikachan, mrfoxtalbot, mukesh27, poena, ryokuhi, sabernhardt, thrijith.
Fixes#56496.
Built from https://develop.svn.wordpress.org/trunk@59289
git-svn-id: http://core.svn.wordpress.org/trunk@58681 1a063a9b-81f0-0310-95a4-ce76da25c4cd
c2441a3d71