Add example to lower_case_table_names documentation

The syntax isn't super obvious so having an example helps.

Documentation/Authenticators/MySQL-Authenticator.md

@@ -80,3 +80,7 @@ case-insensitive by converting all names into their lowercase form.
 
 **Note:** The identifier names are converted using an ASCII-only function. This
   means that non-ASCII characters will retain their case-sensitivity.
+
+```
+authenticator_options=lower_case_table_names=false
+```