Editor change (#561)

The WG thanks Chai for his major contributions as a co-editor
and welcomes Dwayne into his new role.

Author: anssiko

index.bs

@@ -7,7 +7,8 @@ Group: webmlwg
 TR: https://www.w3.org/TR/webnn/
 URL: https://webmachinelearning.github.io/webnn/
 Editor: Ningxin Hu 68202, Intel Corporation https://intel.com
-Editor: Chai Chaoweeraprasit 120203, Microsoft Corporation https://microsoft.com
+Editor: Dwayne Robinson 140212, Microsoft Corporation https://microsoft.com
+Former Editor: Chai Chaoweeraprasit 120203, Microsoft Corporation https://microsoft.com
 Abstract: This document describes a dedicated low-level API for neural network inference hardware acceleration.
 Repository: https://github.com/webmachinelearning/webnn
 Test Suite: https://github.com/web-platform-tests/wpt/tree/master/webnn