chore(devservices): Fixing capitalization in update help message (#12550)

Author: IanWoodard

develop-docs/development-infrastructure/devservices.mdx

@@ -21,7 +21,7 @@ commands:
   list-services (ls)  List the services installed locally
   status              View status of a service
   logs                View logs for a service
-  update              update devservices to the latest version
+  update              Update devservices to the latest version
   purge               Purge the local devservices cache
 ```