Development version 3.3.0-RC1 (#16283)

As we have agreed, after 3.2.2 we are going for 3.3.0.

/cc @odersky for ack

Author: Kordyjan

project/Build.scala

@@ -80,9 +80,9 @@ object DottyJSPlugin extends AutoPlugin {
 object Build {
   import ScaladocConfigs._
 
-  val referenceVersion = "3.2.1"
+  val referenceVersion = "3.2.2-RC1"
 
-  val baseVersion = "3.2.2-RC1"
+  val baseVersion = "3.3.0-RC1"
 
   // Versions used by the vscode extension to create a new project
   // This should be the latest published releases.