Update README.md

Author: wallscheid

README.md

@@ -5,7 +5,7 @@
 [![made-with-latex](https://img.shields.io/badge/Made%20with-LaTeX-1f425f.svg)](https://www.latex-project.org/)
 
 This work is licensed under a
-[Creative Commons Attribution-ShareAlike 4.0 International License][cc-by].
+[Creative Commons Attribution 4.0 International License][cc-by].
 
 [![CC BY 4.0][cc-by-image]][cc-by]