(PA-6856) Update sync.yml with bhg version

Author: skyamgarp

.sync.yml

@@ -18,6 +18,7 @@ Gemfile:
         version: '~> 1'
       - gem: beaker-hostgenerator
         from_env: BEAKER_HOSTGENERATOR_VERSION
+        version: '~> 2'
       - gem: beaker-rspec
         from_env: BEAKER_RSPEC_VERSION
       # Prevent beaker-puppet from being installed on Ruby > 3.1 until beaker-puppet supports newer Rubies (PA-6136)