chore: Set latest RC to 3.7.2-RC1 (#3750)

Author: tgodzik

project/deps/package.mill.scala

@@ -16,8 +16,8 @@ object Scala {
   def scala3Next          = s"$scala3NextPrefix.1" // the newest/next version of Scala
   def scala3NextAnnounced =
     s"$scala3NextPrefix.0" // the newest/next version of Scala that's been announced
-  def scala3NextRc        = "3.7.1-RC2"            // the latest RC version of Scala Next
-  def scala3NextRcAnnounced = scala3NextRc // the latest announced RC version of Scala Next
+  def scala3NextRc        = "3.7.2-RC1"            // the latest RC version of Scala Next
+  def scala3NextRcAnnounced = "3.7.1-RC2" // the latest announced RC version of Scala Next
 
   // The Scala version used to build the CLI itself.
   def defaultInternal = sys.props.get("scala.version.internal").getOrElse(scala3Lts)