Version bump to v2.6.0.beta2

Version bump to v2.6.0.beta2

diff --git a/lib/version.rb b/lib/version.rb
index 639a717..addca5b 100644
--- a/lib/version.rb
+++ b/lib/version.rb
@@ -10,7 +10,7 @@ module Discourse
       MAJOR = 2
       MINOR = 6
       TINY  = 0
-      PRE   = 'beta1'
+      PRE   = 'beta2'
 
       STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
     end

GitHub sha: 713e6f1b