Fix license badge.

Signed-off-by: Shishir Mahajan <[email protected]>

Author: shishir-a412ed

README.md

@@ -1,6 +1,6 @@
 # docker lvm plugin
 [![CircleCI](https://circleci.com/gh/containers/docker-lvm-plugin/tree/master.svg?style=shield&circle-token=af715d8feae4c98aa240cfae4985a2bb0ee017bb)](https://circleci.com/gh/containers/docker-lvm-plugin/tree/master)
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://github.com/containers/docker-lvm-plugin/blob/master/LICENSE)
+[![License: GNU LGPL v3.0](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://github.com/containers/docker-lvm-plugin/blob/master/LICENSE)
 [![Release](https://img.shields.io/badge/version-1.0-blue)](https://github.com/containers/docker-lvm-plugin/releases/tag/v1.0)
 
 Docker Volume Driver for lvm volumes