Fixed theme URL

Gemfile

@@ -15,7 +15,7 @@ gem "bundler", "~> 1.16.1"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.0"
 gem 'jekyll-theme-primer', '~> 0.5.2'
-gem 'jekyll-theme-lcsb-default', :git => "ssh://git@git-r3lab-server.uni.lu:8022/core-services/jekyll-theme-lcsb-default.git", :branch => "master"
+gem 'jekyll-theme-lcsb-default', :git => "https://git-r3lab.uni.lu/core-services/jekyll-theme-lcsb-default.git", :branch => "master"
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.