fix js syntax error

app/views/help/index.html.haml

@@ -22,7 +22,7 @@
           = mail_to Gitlab.config.gitlab.support_email, "support contact"
         %li
           Use the
-          = link_to "search bar", '#', onclick: "$("#search").focus();"
+          = link_to "search bar", '#', onclick: "$('#search').focus();"
           on the top of this page
         %li
           Ask in our