Fix docker-compose link

README.md

@@ -61,7 +61,7 @@ that by providing one-click installation on various platforms.
   [Mac](https://github.com/wekan/wekan/wiki/Mac) / [Windows](https://github.com/wekan/wekan/wiki/Install-Wekan-from-source-on-Windows).
   [More Platforms](https://github.com/wekan/wekan/wiki/Platforms), bundle for RasPi3 ARM and other CPUs where Node.js and MongoDB exists.
 - 1 GB RAM minimum free for Wekan. Production server should have minimum total 4 GB RAM.
-  For thousands of users, for example with [Docker](https://github.com/wekan/wekan/blob/devel/docker-compose.yml): 3 frontend servers,
+  For thousands of users, for example with [Docker](https://github.com/wekan/wekan/blob/master/docker-compose.yml): 3 frontend servers,
   each having 2 CPU and 2 wekan-app containers. One backend wekan-db server with many CPUs.  
 - Enough disk space and alerts about low disk space. If you run out disk space, MongoDB database gets corrupted.
 - SECURITY: Updating to newest Wekan version very often. Please check you do not have automatic updates of Sandstorm or Snap turned off.