Update tunnelblick-beta to 3.7.5beta03,4950 (#4901)

Casks/tunnelblick-beta.rb

@@ -1,11 +1,11 @@
 cask 'tunnelblick-beta' do
-  version '3.7.5beta02,4930'
-  sha256 '353ff26a41e6d380891092e35d94d66b5c99e14ea6d6260219a72ee9339975ec'
+  version '3.7.5beta03,4950'
+  sha256 'c6784beb131dfe261f53a69616bcc3837e4af71e966940b9e2d4e717c39270c8'
 
   # github.com/Tunnelblick/Tunnelblick/releases/download was verified as official when first introduced to the cask
   url "https://github.com/Tunnelblick/Tunnelblick/releases/download/v#{version.before_comma}/Tunnelblick_#{version.before_comma}_build_#{version.after_comma}.dmg"
   appcast 'https://github.com/Tunnelblick/Tunnelblick/releases.atom',
-          checkpoint: 'c9a34948008a7abf8f21434a36aa3b90e0b8e5735a3f2fe7cb94f08fab3e5470'
+          checkpoint: '2c1da01ed1256f05f2fd37adc9c9779d72b2d2238f979c03e81d6007031d1904'
   name 'Tunnelblick'
   homepage 'https://www.tunnelblick.net/'