Correct error in ResourceGroup Parameter Description

The ResourceGroup Parameter Description indicated that this was the resource group to copy to, which is incorrect, it is the resource group to copy from.

Author: sam-cogan

src/ResourceManager/Sql/Commands.Sql/help/New-AzureRmSqlDatabaseCopy.md

@@ -143,7 +143,7 @@ Accept wildcard characters: False
 ```
 
 ### -ResourceGroupName
-Specifies the name of the  Resource Group to which this cmdlet assigns the copied database.
+Specifies the name of the  Resource Group that contains the database to copy.
 
 ```yaml
 Type: String