Update README.md

Author: dceejay

README.md

@@ -8,7 +8,7 @@
 This project describes some of the many ways Node-RED can be run under Docker and has support for multiple architectures (amd64, arm32v6, arm32v7, arm64v8, i386 and s390x).
 Some basic familiarity with Docker and the [Docker Command Line](https://docs.docker.com/engine/reference/commandline/cli/) is assumed.
 
-**Note**: In version 1.2 we removed the named VOLUME from the build. It should not affect many users - but the details are [here](volumechanges).
+**Note**: In version 1.2 we removed the named VOLUME from the build. It should not affect many users - but the details are [here](volumechanges.md).
 
 As of Node-RED 1.0 this project provides the build for the `nodered/node-red` container on [Docker Hub](https://hub.docker.com/r/nodered/node-red/).