Update understanding/conformance.html

Co-authored-by: Patrick H. Lauke <redux@splintered.co.uk>

Author: mbgower

understanding/conformance.html

@@ -642,7 +642,7 @@ <h3>Level of Assistive Technology Support Needed for "Accessibility Support"</h3
 
          <p>This topic raises the question of how many or which assistive technologies must support
             a Web technology in order for that Web technology to be considered "accessibility
-            supported". The AG Working Group and the W3C do not specify which or how many assistive
+            supported". The Accessibility Guidelines Working Group and the W3C do not specify which or how many assistive
             technologies must support a Web technology in order for it to be classified as accessibility
             supported. This is a complex topic and one that varies both by environment and by
             language. There is a need for an external and international dialogue on this topic.