Move Adam Turner to co-maintainers (#10557)

Author: AA-Turner

AUTHORS

@@ -15,10 +15,10 @@ Other co-maintainers:
 * Jean-François Burnol <@jfbu>
 * Yoshiki Shibukawa <@shibu_jp>
 * Timotheus Kampik - <@TimKam>
+* Adam Turner - <@AA-Turner>
 
 Other contributors, listed alphabetically, are:
 
-* Adam Turner -- JavaScript improvements
 * Alastair Houghton -- Apple Help builder
 * Alexander Todorov -- inheritance_diagram tests and improvements
 * Andi Albrecht -- agogo theme