Tentatively update changelog

Will need to confirm this though

Tentatively update changelog
dcd3698e · David Robertson · b85c3485 · dcd3698e · b85c3485
Unverified Commit dcd3698e authored 1 year ago by David Robertson
--- a/changelog.d/16220.bugfix
+++ b/changelog.d/16220.bugfix
+Fix a performance regression introduced in Synapse 1.91.0 where event persistence would cause excessive CPU usage over time.
--- a/changelog.d/16220.misc
+++ b/changelog.d/16220.misc
-Fix typo where we ended up with multiple `WorkerLocksHandler`.