Merge pull request #15882 from dotty-staging/reference-version-3.2.0-RC4

Set reference version to 3.2.0-RC4

Author: prolativ

project/Build.scala

@@ -80,7 +80,7 @@ object DottyJSPlugin extends AutoPlugin {
 object Build {
   import ScaladocConfigs._
 
-  val referenceVersion = "3.2.0-RC3"
+  val referenceVersion = "3.2.0-RC4"
 
   val baseVersion = "3.2.1-RC1"