docs: add description of how to use a custom table name to the ORM example – (#12408)

Author: tarasyyyk

doc/docs.md

@@ -4009,8 +4009,9 @@ V's ORM provides a number of benefits:
 ```v
 import sqlite
 
+// sets a custom table name. Default is struct name (case-sensitive)
+[table: 'customers']
 struct Customer {
-	// struct name has to be the same as the table name (for now)
 	id        int    [primary; sql: serial] // a field named `id` of integer type must be the first field
 	name      string [nonull]
 	nr_orders int
@@ -4030,7 +4031,7 @@ sql db {
 	create table Customer
 }
 
-// select count(*) from Customer
+// select count(*) from customers
 nr_customers := sql db {
 	select count from Customer
 }