feat: add ssh key to committing stage

lib/jekyll-theme-lcsb-default.rb

 # frozen_string_literal: true
 
-# Note: keep the format of NUMBER.NUMBER.NUMBER (where NUMBER is [0-9]+) - otherwise Gitlab-CI could fail to detect the version (see .gitlab-ci.yml) and auto-tag job
+# Note: keep the format of NUMBER.NUMBER.NUMBER (where NUMBER is [0-9]+)
+# Otherwise Gitlab-CI could fail to detect the version (see .gitlab-ci.yml) and auto-tag job
 module Theme
     VERSION = "0.3.17"
 end