README: fix link formatting on github's markdown renderer

README.md

@@ -4,9 +4,7 @@ ranger 1.9.3
 <img src="https://ranger.github.io/ranger_logo.png" width="150">
 
 [![Build Status](https://travis-ci.org/ranger/ranger.svg?branch=master)](https://travis-ci.org/ranger/ranger)
-<a href="https://repology.org/metapackage/ranger/versions">
-  <img src="https://repology.org/badge/latest-versions/ranger.svg" alt="latest packaged version(s)">
-</a>
+<a href="https://repology.org/metapackage/ranger/versions"><img src="https://repology.org/badge/latest-versions/ranger.svg" alt="latest packaged version(s)"></a>
 [![Donate via Liberapay](https://img.shields.io/liberapay/patrons/ranger)](https://liberapay.com/ranger)
 
 ranger is a console file manager with VI key bindings.  It provides a