Update README.md

Author: cdimascio

README.md

@@ -30,7 +30,7 @@
 
 [![GitHub stars](https://img.shields.io/github/stars/cdimascio/express-openapi-validator.svg?style=social&label=Star&maxAge=2592000)](https://GitHub.com/cdimascio/express-openapi-validator/stargazers/) [![Twitter URL](https://img.shields.io/twitter/url/https/github.com/cdimascio/express-openapi-validator.svg?style=social)](https://twitter.com/intent/tweet?text=Check%20out%20express-openapi-validator%20by%20%40CarmineDiMascio%20https%3A%2F%2Fgithub.com%2Fcdimascio%2Fexpress-openapi-validator%20%F0%9F%91%8D)
 
-[Express 5](https://expressjs.com/en/5x/api.html) support available in `>=v5.5.0`!_
+[Express 5](https://expressjs.com/en/5x/api.html) support available in `>=v5.5.0`!
 
 [OAS 3.1](https://github.com/cdimascio/express-openapi-validator/pull/882) support available in `>=v5.4.0`!