Update 7.14-to-8.0.md

Add missing path change back

doc/update/7.14-to-8.0.md

@@ -99,6 +99,7 @@ Don't store it in the same place as your database backups,
 otherwise your secrets are exposed if one of your backups is compromised.
 ```
+cd /home/git/gitlab
 sudo -u git -H cp config/secrets.yml.example config/secrets.yml
 sudo -u git -H chmod 0600 config/secrets.yml
 ```