Add a BI connector C Authentication plugin Windows commandline example

In https://docs.mongodb.com/bi-connector/master/reference/auth-plugin-c/#example-command
we should provide also a Windows example, such as:

mysql -h localhost --port 3307 --default-auth=mongosql_auth --user="myTestUser?source=test&mechanism=SCRAM-SHA-1" -p --plugin-dir="C:\Program Files\MySQL\MySQL Server 5.7\lib\plugin"

Please note that the quotes used for the parameters are different from the Linux example because of the Windows command line syntax differences.