chore: fix order of releases in TOC

Author: sarahhaggarty

docs/kr.tree

@@ -34,10 +34,10 @@
 	</toc-element>
 	<toc-element toc-title="What's new in Kotlin">
 		<toc-element toc-title="Kotlin 2.2.0" accepts-web-file-names="whatsnew.html" topic="whatsnew22.md"/>
-		<toc-element toc-title="Kotlin 2.1.0" topic="whatsnew21.md"/>
+		<toc-element toc-title="Kotlin 2.1.20" topic="whatsnew2120.md"/>
 		<toc-element toc-title="Kotlin 2.2.20-Beta1" topic="whatsnew-eap.md"/>
 		<toc-element toc-title="Earlier versions">
-			<toc-element toc-title="Kotlin 2.1.20" topic="whatsnew2120.md"/>
+			<toc-element toc-title="Kotlin 2.1.0" topic="whatsnew21.md"/>
 			<toc-element toc-title="Kotlin 2.0.20" topic="whatsnew2020.md"/>
 			<toc-element toc-title="Kotlin 2.0.0" topic="whatsnew20.md"/>
 			<toc-element toc-title="Kotlin 1.9.20" topic="whatsnew1920.md"/>