Editorial: Add w3cid for Mike West as editor (w3c#17)

The W3C publication policy (and pubrules checker) apparently now
requires that all document metadata include the W3C user ID for
each editor. So this change adds Mike West’s W3C ID.

Author: sideshowbarker

index.bs

@@ -5,7 +5,7 @@ Level: 1
 Status: ED
 Group: WebAppSec
 URL: https://w3c.github.io/webappsec-post-spectre-webdev/
-Editor: Mike West, Google, [email protected]
+Editor: Mike West, Google, [email protected], w3cid 56384
 Abstract:
     Post-Spectre, we need to adopt some new strategies for safe and secure web development. This
     document outlines a threat model we can share, and a set of mitigation recommendations.