Add missing geo-secondary to underscore conversion

One of the conversions was lost in the resolution of merge-conflict.

Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

files/gitlab-cookbooks/gitlab-ee/recipes/default.rb

@@ -47,7 +47,7 @@ end
 rails_enable = node['gitlab']['gitlab-rails']['enable']
 # Geo secondary
-if node['gitlab']['geo-secondary']['enable']
+if node['gitlab']['geo_secondary']['enable']
   if rails_enable
     include_recipe 'gitlab-ee::geo-secondary'
     include_recipe 'gitlab-ee::geo_database_migrations'