[GHES 3.17.4 patch release] Update script instructions for bug that is fixed in GHES 3.17.4 (#56712)

Author: felicitymay

content/admin/backing-up-and-restoring-your-instance/backup-service-for-github-enterprise-server/configuring-the-backup-service.md

@@ -62,15 +62,29 @@ If you're using a dedicated block device as your backup target, you need to init
 
     >[!WARNING] This command will permanently erase all data on the specified device. Double-check the device name and back up any important data before proceeding.
 
+    {% ifversion ghes > 3.17 %}
+
+    ```shell
+    ghe-storage-init-backup /dev/YOUR_DEVICE_NAME
+    ```
+
+    {% else %}
+
     ```shell
     /usr/local/share/enterprise/ghe-storage-init-backup /dev/YOUR_DEVICE_NAME
     ```
 
+    {% endif %}
+
     This command:
     * Formats the device (erases all data).
     * Prepares it for use by the backup service.
     * Sets it to mount automatically at `/data/backup` on boot.
 
+    {% ifversion ghes = 3.17 %}
+    From {% data variables.product.prodname_ghe_server %} 3.17.4 onward, the script is installed in PATH so you can run it directly using: `ghe-storage-init-backup /dev/YOUR_DEVICE_NAME`.
+    {% endif %}
+
 #### Reusing a previously initialized disk
 
 If the device was already initialized using `ghe-storage-init-backup`, you can reuse it without reformatting: