Remove outdated gitlab-git-http-server reference from Install doc

doc/install/installation.md

@@ -552,6 +552,6 @@ Apart from the always supported markdown style there are other rich text files t
 
 If you see this message when attempting to clone a repository hosted by GitLab,
 this is likely due to an outdated Nginx or Apache configuration, or a missing or
-misconfigured `gitlab-git-http-server` instance. Double-check that you've
-[installed Go](#3-go), [installed gitlab-git-http-server](#install-gitlab-git-http-server),
+misconfigured gitlab-workhorse instance. Double-check that you've
+[installed Go](#3-go), [installed gitlab-workhorse](#install-gitlab-workhorse),
 and correctly [configured Nginx](#site-configuration).