Add Changelog episode badge to proper README

README.md in the root folder is generated by the build process.
This commit prevents badge from being lost

Ref: #10179

src/README.md-nobuild

@@ -1,6 +1,6 @@
 ---
 ---
-# [Font Awesome v{{ site.fontawesome.version }}]({{ site.fontawesome.url }})
+# [Font Awesome v{{ site.fontawesome.version }}]({{ site.fontawesome.url }}) [![Changelog #226](https://img.shields.io/badge/changelog-%23226-9E978E.svg)](https://changelog.com/podcast/226)
 ### The iconic font and CSS framework
 
 Font Awesome is a full suite of {{ icons | size }} pictographic icons for easy scalable vector graphics on websites,