Update telegram-alpha to 3.2.1-104303,596 (#4408)

Casks/telegram-alpha.rb

@@ -1,11 +1,11 @@
 cask 'telegram-alpha' do
-  version '3.2.1-104112,592'
+  version '3.2.1-104303,596'
-  sha256 'a7813c19e79e5975979167c4d76850f5c64cc138b72d0501eeea9bee1663f627'
+  sha256 '169a8a1ad6733f4ec54e2411d19474f48317b7e7f72cb8daec8a4986ad048325'
 
   # 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: '2993dc5430a7607e4888ed083bc367be70299c06f43db8ffa537d68f6cad8d77'
+          checkpoint: '6a78c6b89863e6e4c643230e675c3515ff77d4a8c11b109eda8fac8904a8d55e'
   name 'Telegram for macOS'
   name 'Telegram Swift'
   homepage 'https://macos.telegram.org/'