Fix a yum typo. Because errors can happen, people are involved in all these processes not aliens.

0e4e7d14 · Marin Jankovski · 5f71d76a · 0e4e7d14
Commit 0e4e7d14 authored 9 years ago by Marin Jankovski
--- a/source/_posts/2015-05-01-gitlab-on-debian-8.markdown
+++ b/source/_posts/2015-05-01-gitlab-on-debian-8.markdown
@@ -19,5 +19,5 @@ of [Packagecloud.io](https://www.packagecloud.io). You can install GitLab Commun
  
 ```
 curl https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb | sudo bash
-sudo yum install gitlab-ce
-```
\ No newline at end of file
+sudo apt-get install gitlab-ce
+```