Update script.load.balancer.attach property value

Add the `%t` parameter to the `script.load.balancer.attach` property value example.

product_docs/docs/efm/4/efm_deploy_arch/05_efm_pgbouncer.mdx

@@ -92,7 +92,7 @@ efm can execute the script, which has the following contents:
 2. On each database node, set `script.load.balancer.attach` to the custom script in the `efm` properties file:
 
 ``` text
-    script.load.balancer.attach=/usr/edb/efm-4.2/bin/efm_pgbouncer_functions attach %h <pgbs1>,<pgbs2>
+    script.load.balancer.attach=/usr/edb/efm-4.2/bin/efm_pgbouncer_functions attach %h %t <pgbs1>,<pgbs2>
 ```
 `<pgbs1>` is the hostname or IP address for PgBouncer server 1 and `<pgbs2>` is the hostname or IP address for PgBouncer server 2.