Merge branch 'dfosco/update-deployments-icon-reference' into 'master'

Update reference to 'deployments' icon on sidebar

See merge request gitlab-org/gitlab!71381

lib/sidebars/projects/menus/deployments_menu.rb

@@ -27,7 +27,7 @@ module Sidebars
 
         override :sprite_icon
         def sprite_icon
-          'environment'
+          'deployments'
         end
 
         private