docs(changelog): fix title in v.2.1.0 announcement (#2591)

Author: wardbell

public/docs/ts/latest/guide/change-log.jade

@@ -7,7 +7,7 @@ block includes
   The Angular documentation is a living document with continuous improvements.
   This log calls attention to recent significant changes.
 
-  ## Sync with Angular v.2.0.2 (2016-10-12)
+  ## Sync with Angular v.2.1.0 (2016-10-12)
   Docs and code samples updated and tested with Angular v.2.1.0 
 
   ## NEW "Ahead of Time (AoT) Compilation" cookbook (2016-10-11)