fix(llc): merge channel in channel.update event

[xsahil03x]

Fixes: #1047

[codecov]

Codecov Report

Merging #1049 (23dd1b0) into develop (604546d) will decrease coverage by 0.00%.
The diff coverage is 50.00%.

@@             Coverage Diff             @@
##           develop    #1049      +/-   ##
===========================================
- Coverage    76.09%   76.09%   -0.01%     
===========================================
  Files          192      192              
  Lines        20672    20673       +1     
===========================================
  Hits         15731    15731              
- Misses        4941     4942       +1     

Impacted Files	Coverage Δ
packages/stream_chat/lib/src/client/channel.dart	63.55% <0.00%> (-0.07%)	⬇️
...stream_chat/lib/src/core/models/channel_model.dart	100.00% <100.00%> (ø)

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