Fix install docs for gitlab-shell setup rake task

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

doc/install/installation.md

@@ -27,10 +27,9 @@ The GitLab installation consists of setting up the following components:
 1. Packages / Dependencies
 2. Ruby
 3. System Users
-4. GitLab shell
-5. Database
-6. GitLab
-7. Nginx
+4. Database
+5. GitLab
+6. Nginx
 
 
 # 1. Packages / Dependencies
@@ -261,7 +260,7 @@ GitLab Shell is an ssh access and repository management software developed speci
     cd /home/git/gitlab
 
     # Run the installation task for gitlab-shell (replace `REDIS_URL` if needed):
-    sudo -u git -H bundle exec rake gitlab:shell:setup[v1.9.3] REDIS_URL=redis://localhost:6379
+    sudo -u git -H bundle exec rake gitlab:shell:install[v1.9.3] REDIS_URL=redis://localhost:6379
 
     # By default, the gitlab-shell config is generated from your main gitlab config. You can review (and modify) it as follows:
     sudo -u git -H editor /home/git/gitlab-shell/config.yml