docs(badges): add the OSI logo to the license badge

Author: travi

README.md

@@ -112,7 +112,7 @@ $ npm test
 
 [license-link]: LICENSE
 
-[license-badge]: https://img.shields.io/github/license/form8ion/commit-convention.svg
+[license-badge]: https://img.shields.io/github/license/form8ion/commit-convention.svg?logo=opensourceinitiative
 
 [npm-link]: https://www.npmjs.com/package/@form8ion/commit-convention