[Improvement]: Correct Default Elasticsearch Worker Limits in GHES 3.13 Documentation (#57351)

Author: sophietheking

content/admin/upgrading-your-instance/performing-an-upgrade/preparing-for-the-elasticsearch-upgrade.md

@@ -43,7 +43,7 @@ When the index rebuild is complete, all the search indexes should show green and
 
 ## Changing the number of repair workers
 
-By default, the number of index repair workers is set to the number of CPU cores divided by 8 (with an upper bound of 8). To speed up the index rebuild, you can adjust the worker count. However, before doing so, you should consider the potential impact to the load.
+By default, the number of index repair workers is set to the number of CPU cores divided by 8 (with an upper bound of 16). To speed up the index rebuild, you can adjust the worker count. However, before doing so, you should consider the potential impact to the load.
 
 {% data reusables.enterprise_installation.ssh-into-instance %}
 1. To change the number of workers, enter the following command.