Update tunnelblick-beta to 3.7.5beta01,4910 (#4699)

Casks/tunnelblick-beta.rb

@@ -1,11 +1,11 @@
 cask 'tunnelblick-beta' do
-  version '3.7.4beta01,4890'
-  sha256 '51d7fcff9ac1cd0dc8056ad9e772678b0816218da7e38bf9dc9ffd10af849e39'
+  version '3.7.5beta01,4910'
+  sha256 'a7a006228e780c520a14434ea387458798ecd6a1f17f8a334cc0459862991218'
 
   # 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: 'a25382dc78399c7abe953184b050e12a2d398c7186d7b95d0cc50cafb30259b5'
+          checkpoint: '25fed445d9974e8a0450a826a991ee4b79268f0ef072f22ead6f5b50887469d0'
   name 'Tunnelblick'
   homepage 'https://www.tunnelblick.net/'