* commit '6a8fd03ac':
1.21.0rc2
1.21.0rc2
Fix bug in remote thumbnail search (#8438)
Fix DB query on startup for negative streams. (#8447)
Convert additional templates to Jinja (#8444)
Fix malformed log line in new federation "catch up" logic (#8442)
Do not expose the experimental appservice login flow to clients. (#8440)
update changelog
fix a logging error in thumbnailer (#8435)
changelog fixes
fix version number