Move from btn-success to btn-confirm in hooks directory

app/views/projects/hooks/edit.html.haml

@@ -10,7 +10,7 @@
     = form_for [@project, @hook], as: :hook, url: project_hook_path(@project, @hook) do |f|
       = render partial: 'shared/web_hooks/form', locals: { form: f, hook: @hook }
 
-      = f.submit 'Save changes', class: 'btn gl-button btn-success gl-mr-3'
+      = f.submit 'Save changes', class: 'btn gl-button btn-confirm gl-mr-3'
       = render 'shared/web_hooks/test_button', hook: @hook
       = link_to _('Delete'), project_hook_path(@project, @hook), method: :delete, class: 'btn gl-button btn-danger float-right', data: { confirm: _('Are you sure?') }
 

app/views/projects/hooks/index.html.haml

@@ -9,6 +9,6 @@
   .col-lg-8.gl-mb-3
     = form_for @hook, as: :hook, url: polymorphic_path([@project, :hooks]) do |f|
       = render partial: 'shared/web_hooks/form', locals: { form: f, hook: @hook }
-      = f.submit 'Add webhook', class: 'gl-button btn btn-success'
+      = f.submit 'Add webhook', class: 'gl-button btn btn-confirm'
 
     = render 'shared/web_hooks/index', hooks: @hooks, hook_class: @hook.class