Docs: Add Badge for OpenSSF ScoreCard

(fixes #27)

Author: uniqueck

README.md

@@ -2,4 +2,5 @@
 
 [![Build status](https://github.com/uniqueck/htmlSanityCheck.js/actions/workflows/ci.yaml/badge.svg?branch=main)](https://github.com/uniqueck/htmlSanityCheck.js/actions/workflows/ci.yaml)
 [![npm version](http://img.shields.io/npm/v/htmlsanitycheck.svg)](https://www.npmjs.com/package/htmlsanitycheck)
-[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=uniqueck_htmlSanityCheck.js&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=uniqueck_htmlSanityCheck.js)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=uniqueck_htmlSanityCheck.js&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=uniqueck_htmlSanityCheck.js)
+[![OpenSSF Scorecard](https://api.scorecard.dev/projects/github.com/uniqueck/htmlSanityCheck.js/badge)](https://scorecard.dev/viewer/?uri=github.com/uniqueck/htmlSanityCheck.js)