chore(release): Add changelog for 18.0.0-rc.3

[nickvergessen]

18.0.0-rc.3 – 2023-12-07

Added

• feat(call): Add screensharing support to the viewer-overlay #11033
• feat(conversations): Always show create conversation button #11104
• fix(chat): Add metadata to file parameters on API level so clients can calculate aspect ratio of previews #11131

Changed

• Update several dependencies
• Update translations

Fixed

• fix(chat): Fix various cases of handling (in)active sessions while chatting and calling #11125 #11140
• fix(chat): Only load current absence not future ones #11124
• fix(chat): Fix file share with caption quote reply #11128
• fix(poll): Reorganize component structure and hide "End poll" from first view #11109
• fix(call): Cancel scheduled participant request when requesting new one #11097
• fix(chat): Expand system messages group if visual unread marker is set on it #11067
• fix(chat): Handle silent sending and input paste correctly in media captions #11123
• fix(conversations): Remove label from talk search input #11071
• fix(video-verification): Remove unneeded settings from video-verification screen #11138