Update telegram-alpha to 2.91.91166,204 (#3539)

Casks/telegram-alpha.rb

@@ -1,11 +1,11 @@
 cask 'telegram-alpha' do
-  version '2.91.90980,198'
-  sha256 '2d98aa77fa9f98f9ad83cec9edc842d1b6620530303ea95a8cddbe5239e1d8a0'
+  version '2.91.91166,204'
+  sha256 'ffcc4c5523bc43172113172eeb88a9681cf86ee8e6cb5aa5e9de4cb2a26b19ce'
 
   # hockeyapp.net/api/2/apps/6ed2ac3049e1407387c2f1ffcb74e81f was verified as official when first introduced to the cask
   url "https://rink.hockeyapp.net/api/2/apps/6ed2ac3049e1407387c2f1ffcb74e81f/app_versions/#{version.after_comma}?format=zip"
   appcast 'https://rink.hockeyapp.net/api/2/apps/6ed2ac3049e1407387c2f1ffcb74e81f',
-          checkpoint: '57d374c6d2bdf930b277fea581f4339b1d6b9d3757e43214756718f9663e2a72'
+          checkpoint: '542c5fa86f4ed498efc8c715a5f4c902feeb9339744f0f495cecf576499fbdc3'
   name 'Telegram for macOS'
   name 'Telegram Swift'
   homepage 'https://macos.telegram.org/'