Update 2.deploy-connect-dashboard-ent.md (#1420)

docs-2.0/nebula-dashboard-ent/2.deploy-connect-dashboard-ent.md

@@ -8,7 +8,7 @@ Before deploying Dashboard Enterprise Edition, you must do a check of these:
 
 - Select and download Dashboard Enterprise Edition of the correct version. For information about the version correspondence between Dashboard Enterprise Edition and Nebula Graph, see [Version compatibility](1.what-is-dashboard-ent.md).
 
-- The environment of [MySQL](https://www.mysql.com/) is ready and a database named as `dashboard` is created.
+- The environment of [MySQL](https://www.mysql.com/) is ready and a MySQL database named as `dashboard` is create. Make sure the default character set of the database is `utf8`.
 - Before the installation starts, the following ports are not occupied.
 
  | Port | Description |