fix link

Author: vertical-blank

README.md

@@ -4,7 +4,7 @@
 ![travis](https://api.travis-ci.org/vertical-blank/sql-formatter.svg?branch=master)
 [![codecov](https://codecov.io/gh/vertical-blank/sql-formatter/branch/master/graph/badge.svg)](https://codecov.io/gh/vertical-blank/sql-formatter)
 
-Java port of great SQL formatter <https://github.com/zeroturnaround/sql-formatter.>
+Java port of great SQL formatter <https://github.com/zeroturnaround/sql-formatter>.
 
 Written with only Java Standard Library, without dependencies.