docs: add OSSF Scorecard badge (#5436)

PR-URL: #5436

Author: UlisesGascon

Readme.md

@@ -22,6 +22,8 @@
 [![NPM Version][npm-version-image]][npm-url]
 [![NPM Install Size][npm-install-size-image]][npm-install-size-url]
 [![NPM Downloads][npm-downloads-image]][npm-downloads-url]
+[![OpenSSF Scorecard Badge][ossf-scorecard-badge]][ossf-scorecard-visualizer]
+
 
 ```js
 const express = require('express')
@@ -252,4 +254,6 @@ The original author of Express is [TJ Holowaychuk](https://github.com/tj)
 [npm-install-size-url]: https://packagephobia.com/result?p=express
 [npm-url]: https://npmjs.org/package/express
 [npm-version-image]: https://badgen.net/npm/v/express
+[ossf-scorecard-badge]: https://api.securityscorecards.dev/projects/github.com/expressjs/express/badge
+[ossf-scorecard-visualizer]: https://kooltheba.github.io/openssf-scorecard-api-visualizer/#/projects/github.com/expressjs/express
 [Code of Conduct]: https://github.com/expressjs/express/blob/master/Code-Of-Conduct.md