[i18n] Add missing polish translations

[artur-ios-dev]

@RocketChat/ios

[codecov]

Codecov Report

Merging #2601 into develop will increase coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #2601      +/-   ##
===========================================
+ Coverage    25.99%   26.11%   +0.11%     
===========================================
  Files          463      463              
  Lines        17203    17203              
===========================================
+ Hits          4472     4492      +20     
+ Misses       12731    12711      -20

Impacted Files	Coverage Δ
...ocket.Chat/Extensions/Models/ObjectExtension.swift	80% <0%> (-20%)	⬇️
...ontrollers/Base/Main/MainSplitViewController.swift	45% <0%> (-7.5%)	⬇️
...Chat/Controllers/Chat/MessagesViewController.swift	31.49% <0%> (-2.76%)	⬇️
Rocket.Chat/Managers/PushManager.swift	27.58% <0%> (+3.44%)	⬆️
Rocket.Chat/Managers/AppManager.swift	40.11% <0%> (+4.06%)	⬆️
Rocket.Chat/Extensions/Models/AuthExtensions.swift	100% <0%> (+33.33%)	⬆️
...anagers/Model/AuthManager/AuthManagerRecover.swift	96.96% <0%> (+60.6%)	⬆️

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[rafaelks]

Awesome!!! Thank you @artrmz!