Correct section number for 'Check application status'

doc/update/6.4-to-6.5.md

@@ -55,7 +55,7 @@ sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
     sudo service gitlab start
     sudo service nginx restart
 
-### 8. Check application status
+### 6. Check application status
 
 Check if GitLab and its environment are configured correctly:
 
@@ -78,4 +78,4 @@ Follow the [`upgrade guide from 6.3 to 6.4`](6.3-to-6.4.md), except for the data
 ```bash
 cd /home/git/gitlab
 sudo -u git -H bundle exec rake gitlab:backup:restore RAILS_ENV=production
-```
+```