Add missing code fence closure

doc/update/7.14-to-8.0.md

@@ -101,6 +101,7 @@ otherwise your secrets are exposed if one of your backups is compromised.
 ```
 sudo -u gitlab_ci -H cp config/secrets.yml.example config/secrets.yml
 sudo -u gitlab_ci -H chmod 0600 config/secrets.yml
+```
 
 ### 7. Install libs, migrations, etc.