Appy gitlab button style to buttons in app/views/admin/hook_logs directory

app/views/admin/hook_logs/show.html.haml

@@ -4,6 +4,6 @@
 
 %hr
 
-= link_to _("Resend Request"), retry_admin_hook_hook_log_path(@hook, @hook_log), method: :post, class: "btn btn-default float-right gl-ml-3"
+= link_to _("Resend Request"), retry_admin_hook_hook_log_path(@hook, @hook_log), method: :post, class: "btn gl-button btn-default float-right gl-ml-3"
 
 = render partial: 'shared/hook_logs/content', locals: { hook_log: @hook_log }