Add tooltip to project fork count

CHANGELOG

@@ -31,6 +31,7 @@ v 8.13.0 (unreleased)
   - Close open merge request without source project (Katarzyna Kobierska Ula Budziszewska)
   - Fix that manual jobs would no longer block jobs in the next stage. !6604
   - Add configurable email subject suffix (Fu Xu)
+  - Added tooltip to fork count on project show page. (Justin DiPierro)
   - Use a ConnectionPool for Rails.cache on Sidekiq servers
   - Replace `alias_method_chain` with `Module#prepend`
   - Enable GitLab Import/Export for non-admin users.

app/views/projects/buttons/_fork.html.haml

@@ -5,10 +5,10 @@
         = custom_icon('icon_fork')
         %span Fork
     - else
-      = link_to new_namespace_project_fork_path(@project.namespace, @project), title: "Fork project", class: 'btn has-tooltip' do
+      = link_to new_namespace_project_fork_path(@project.namespace, @project), title: 'Fork project', class: 'btn has-tooltip' do
         = custom_icon('icon_fork')
         %span Fork
     %div.count-with-arrow
       %span.arrow
-      = link_to namespace_project_forks_path(@project.namespace, @project), class: "count" do
+      = link_to namespace_project_forks_path(@project.namespace, @project), title: 'Forks', class: 'count has-tooltip' do
         = @project.forks_count