Mark documentation index as nightly

pikinier20 · pikinier20 · commit 006b314769be · 2022-05-17T14:29:48.000+02:00
diff --git a/docs/_docs/index.md b/docs/_docs/index.md
@@ -1,6 +1,7 @@
 ---
 layout: index
 redirectFrom: /docs/index.html
+nightlyOf: https://docs.scala-lang.org/scala3/reference/
 ---
 
 Dotty is the project name for technologies that are considered for inclusion in Scala 3. Scala has
