Update README.md

Author: yanglbme

solution/3400-3499/3465.Find Products with Valid Serial Numbers/README.md

@@ -113,7 +113,7 @@ tags:
 # Write your MySQL query statement below
 SELECT product_id, product_name, description
 FROM products
-WHERE description REGEXP '\\bSN[0-9]{4}-[0-9]{4}\\b'
+WHERE description REGEXP '(?-i)\\bSN[0-9]{4}-[0-9]{4}\\b'
 ORDER BY 1;
 ```