Merge EbookFoundation#6631 upstream/main commit into docs/contributin…

…g/sync/1

* Add repo badges (see EbookFoundation#5983)

(cherry picked from a16a79b solving merge conflict)

README.md

@@ -1,6 +1,7 @@
 This page is available as an easy-to-read website at [https://ebookfoundation.github.io/](https://ebookfoundation.github.io/free-programming-books/).
 
-# List of Free Learning Resources In Many Languages [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome)
+# List of Free Learning Resources In Many Languages
+[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome) [![License: CC BY 4.0](https://img.shields.io/badge/License-CC%20BY%204.0-lightgrey.svg)](https://creativecommons.org/licenses/by/4.0/)
 
 ## Intro