Update docs to use 4-0-stable recipes

doc/install/installation.md

@@ -288,7 +288,7 @@ Although this is the case, there are still a few steps to go.
 Download the init script (will be /etc/init.d/gitlab):
-    sudo wget https://raw.github.com/gitlabhq/gitlab-recipes/master/init.d/gitlab -P /etc/init.d/
+    sudo wget https://raw.github.com/gitlabhq/gitlab-recipes/4-0-stable/init.d/gitlab -P /etc/init.d/
     sudo chmod +x /etc/init.d/gitlab
 Make GitLab start on boot:
@@ -316,7 +316,7 @@ If you can't or don't want to use Nginx as your web server, have a look at the
 Download an example site config:
-    sudo wget https://raw.github.com/gitlabhq/gitlab-recipes/master/nginx/gitlab -P /etc/nginx/sites-available/
+    sudo wget https://raw.github.com/gitlabhq/gitlab-recipes/4-0-stable/nginx/gitlab -P /etc/nginx/sites-available/
     sudo ln -s /etc/nginx/sites-available/gitlab /etc/nginx/sites-enabled/gitlab
 Make sure to edit the config file to match your setup: