README: link to 2.0 branch for CI status

Author: terrafrost

README.md

@@ -1,6 +1,6 @@
 # mcrypt_compat
 
-[![CI Status](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml/badge.svg?branch=1.0&event=push "CI Status")](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml?query=branch%3A1.0)
+[![CI Status](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml/badge.svg?branch=2.0&event=push "CI Status")](https://github.com/phpseclib/mcrypt_compat/actions/workflows/ci.yml?query=branch%3A2.0)
 
 PHP 5.x-8.x polyfill for mcrypt extension.