Syntax is for sh, not ssh

doc/administration/geo/disaster_recovery/index.md

@@ -216,7 +216,7 @@ Every **secondary** has a special tracking database that is used to save the sta
 Because the **secondary** is already promoted, that data in the tracking database is no longer required.
 The data can be removed with the following command:
 
-    ```ssh
+    ```sh
     sudo rm -rf /var/opt/gitlab/geo-postgresql
     ```