ktl-1690 chore: don't open documentation's links in a new tab

Author: nikpachoo

docs/cfg/buildprofiles.xml

@@ -36,6 +36,7 @@
 			https://kotlinlang.org/assets/images/apple-touch-icon-114x114.png?v2,
 			https://kotlinlang.org/assets/images/apple-touch-icon-144x144.png?v2
 		</custom-favicons>
+		<external-links-in-new-tab>false</external-links-in-new-tab>
 	</variables>
 	<build-profile instance="kr"/>
 </buildprofiles>