Update telegram-alpha to 3.6-109820,720 (#4881)

Casks/telegram-alpha.rb

@@ -1,11 +1,11 @@
 cask 'telegram-alpha' do
-  version '3.6-109808,718'
-  sha256 '06aea4e352463d2f0049ed0ac128a46bf1c54e8faeadbc7122ee817575294ce5'
+  version '3.6-109820,720'
+  sha256 'e92b06db7b168e2e97dd36982b5eedd4ced278a8f468373fe2afdd8d7ad57a0e'
 
   # 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: '827d011abb77692de680b4a4b20d062fcc99f98ae33f156f12975de0a21c6f25'
+          checkpoint: '1f044b51331f1757a98a5555c13ea2a33cee6472399bd211e7fc0c8bf9477922'
   name 'Telegram for macOS'
   name 'Telegram Swift'
   homepage 'https://macos.telegram.org/'