Fix link to SSH help page.

Closes #1981.

app/views/profiles/keys/index.html.haml

@@ -6,7 +6,7 @@
   SSH keys allow you to establish a secure connection between your computer and GitLab
   %br
   Before you can add an SSH key you need to
-  = link_to "generate it", help_page_path("ssh", "ssh")
+  = link_to "generate it", help_page_path("ssh", "README")
 %hr
 = render 'key_table'