Update telegram-alpha to 3.5.3-109546,704 (#4848)

Casks/telegram-alpha.rb

@@ -1,11 +1,11 @@
 cask 'telegram-alpha' do
-  version '3.5.3-109512,703'
-  sha256 '816a6c38777611d109dbe04a0cfd8b5d0e0b41c9b7de098e321220bb364fc1a7'
+  version '3.5.3-109546,704'
+  sha256 'acbeef8da11d7e7d4a7c949d9f90e6e7c70386720c61222260af299ee0d65413'
 
   # 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: '20db8be5022002f5a4372405a8f5ed17ba6f044c73634e15ec318b8acb5c1b9e'
+          checkpoint: '21843fbc711fcdec6ed06196c0d92f8c15b69d071bcd994281c9e5a1022a70c9'
   name 'Telegram for macOS'
   name 'Telegram Swift'
   homepage 'https://macos.telegram.org/'