[FAB-9567] fix broken link to dev instruction

link should point to hyperledger doc

Change-Id: Id425bf5c472da346a491d358b64919365e2511f8
Signed-off-by: Hui Kang <kangh@us.ibm.com>

Author: Hui Kang

devenv/README.md

@@ -1,7 +1,7 @@
 ## Development Environment
 
 If you're looking for instructions on how to setup the Hyperledger Fabric development environment, see
-the [development environment setup readme](https://github.com/hyperledger/fabric/blob/master/docs/dev-setup/devenv.md).
+the [development environment setup readme](http://hyperledger-fabric.readthedocs.io/en/latest/dev-setup/devenv.html).
 
 This folder contains the files which are used for bootstrapping the Hyperledger Fabric development environment.