v28.1.0-rc.1

🦖 Deprecations

• Deprecate MatrixClient.checkUserTrust (#3691).
• Deprecate MatrixClient.{prepare,create}KeyBackupVersion in favour of new CryptoApi.resetKeyBackup API (#3689).

✨ Features

• Allow calls without ICE/TURN/STUN servers (#3695).
• Emit summary update event (#3687). Fixes element-hq/element-web#26033.
• ElementR: Update CryptoApi.userHasCrossSigningKeys (#3646). Contributed by @florianduros.
• Add join_rule field to /publicRooms response (#3673). Contributed by @charlynguyen.
• Use sender instead of content.creator field on m.room.create events (#3675).

🐛 Bug Fixes

• Provide better error for ICE Server SyntaxError (#3694). Fixes element-hq/element-web#21804.
• Legacy crypto: re-check key backup after bootstrapSecretStorage (#3692). Fixes element-hq/element-web#26115.