MySQL: Update README.md (#29003)

* Update README.md

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[skip ci] [ci skip]

* Update public/app/plugins/datasource/mysql/README.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

public/app/plugins/datasource/mysql/README.md

 # MySQL Data Source -  Native Plugin
 
-Grafana ships with a built-in MySQL data source plugin that allow you to query any visualize data from a MySQL compatible database.
+Grafana ships with a built-in MySQL data source plugin that allows you to query and visualize data from a MySQL compatible database.
 
 ## Adding the data source