docs: add esg github adapter to the docs (#579)

Author: hassankhan

README.md

@@ -227,6 +227,7 @@ We know that every project and build process has different requirements so we've
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 - [cz-jira-smart-commit](https://www.npmjs.com/package/cz-jira-smart-commit)
 - [@endemolshinegroup/cz-jira-smart-commit](https://github.com/EndemolShineGroup/cz-jira-smart-commit-esg)
+- [@endemolshinegroup/cz-github](https://github.com/EndemolShineGroup/cz-github)
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