In G200, list G201 as a related technique

Both are about opening links in new windows. G201 already links to G200.

Author: lkmorlan

wcag20/sources/techniques/general/G200.xml

@@ -58,5 +58,6 @@
    <related-techniques>
       <relatedtech idref="H83"/>
       <relatedtech idref="SCR24"/>
+      <relatedtech idref="G201"/>
    </related-techniques>
 </technique>