Update README

Author: tpeczek

README.md

@@ -30,9 +30,7 @@ There are some blog posts available which describe implementation details and so
 
 ## Sponsor This Project
 
-My blog and open source projects are result of my passion for software development, but they require a fair amount of my personal time. If you got value from any of the content I create, then I would appreciate your support by sponsoring me (either monthly or one-time).
-
-<iframe src="https://github.com/sponsors/tpeczek/button" title="Sponsor tpeczek" height="35" width="116" style="border: 0;"></iframe>
+My blog and open source projects are result of my passion for software development, but they require a fair amount of my personal time. If you got value from any of the content I create, then I would appreciate your support by [sponsoring me](https://github.com/sponsors/tpeczek) (either monthly or one-time).
 
 ## Copyright and License