correct liberapay url

Author: cocoz

README.md

@@ -1,7 +1,7 @@
 # postgresqltuner.pl
 
 [![Build Status](https://travis-ci.org/jfcoz/postgresqltuner.svg?branch=master)](https://travis-ci.org/jfcoz/postgresqltuner)
-[![Donate](https://liberapay.com/assets/widgets/donate.svg)](https://liberapay.com/liberapay/donate)
+[![Donate](https://liberapay.com/assets/widgets/donate.svg)](https://liberapay.com/CoCoZ/donate)
 
 `postgresqltuner.pl` is a simple script to analyse your PostgreSQL database. It is inspired by [mysqltuner.pl](https://github.com/major/MySQLTuner-perl)