[FIX] Adjust missing constraint in TextAttachmentCell.xib

[rafaelks]

@RocketChat/ios

[codecov]

Codecov Report

Merging #2343 into develop will decrease coverage by 0.15%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2343      +/-   ##
===========================================
- Coverage    26.39%   26.23%   -0.16%     
===========================================
  Files          440      440              
  Lines        16358    16358              
===========================================
- Hits          4317     4292      -25     
- Misses       12041    12066      +25

Impacted Files	Coverage Δ
...anagers/Model/AuthManager/AuthManagerRecover.swift	36.36% <0%> (-60.61%)	⬇️
...Chat/Models/Subscription/SubscriptionQueries.swift	70% <0%> (-30%)	⬇️
Rocket.Chat/Managers/PushManager.swift	24.13% <0%> (-10.35%)	⬇️
Rocket.Chat/Managers/AppManager.swift	42.75% <0%> (-4.83%)	⬇️
...Chat/Controllers/Chat/MessagesViewController.swift	41.93% <0%> (+2.82%)	⬆️
...ontrollers/Base/Main/MainSplitViewController.swift	52.5% <0%> (+7.5%)	⬆️
...ocket.Chat/Extensions/Models/ObjectExtension.swift	100% <0%> (+20%)	⬆️

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