docs: update license badge for header

md/_header.md

@@ -21,8 +21,8 @@
 ### *I don't have anything to hide, but I don't have anything to show you either.*
 
 ![Updated](https://img.shields.io/static/v1?label=updated&message={{DATE}}&color=388E3C&style=flat-square)
+![License](https://img.shields.io/badge/License-CC--BY--SA%204.0-green.svg?style=flat-square)
 
-![GitHub](https://img.shields.io/github/license/tycrek/degoogle?style=flat-square)
 ![GitHub stars](https://img.shields.io/github/stars/tycrek/degoogle?style=flat-square)
 ![GitHub issues](https://img.shields.io/github/issues/tycrek/degoogle?style=flat-square)
 ![GitHub pull requests](https://img.shields.io/github/issues-pr/tycrek/degoogle?style=flat-square)