Update telegram-alpha to 3.1.2.102726,555 (#4254)

Casks/telegram-alpha.rb

@@ -1,11 +1,11 @@
 cask 'telegram-alpha' do
-  version '3.1.2.102351,554'
-  sha256 'db57d9f73286281ee9d864f727a1655ec6d02ce4ee11e0500a733731c8c48f45'
+  version '3.1.2.102726,555'
+  sha256 'd9121d0a4a9b4cd737743c4179da813297d41e918ee0f5be0dc611e47874ab66'
 
   # 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: 'eb5f2b9f0dc0b17017ef7f1680a66aa6308a7eb8c893f60983d1f37f3fd25bc3'
+          checkpoint: '63112960791e313291575e8de31fb95598183b13c3c5c7fbdd62632128659ab1'
   name 'Telegram for macOS'
   name 'Telegram Swift'
   homepage 'https://macos.telegram.org/'