test: Test 3.3.6-RC1 on Scala CLI repo

Author: tgodzik

project/deps.sc

@@ -7,7 +7,7 @@ object Scala {
   def scala213        = "2.13.16"
   def runnerScala3    = "3.0.2" // the newest version that is compatible with all Scala 3.x versions
   def scala3LtsPrefix = "3.3"   // used for the LTS version tags
-  def scala3Lts        = s"$scala3LtsPrefix.5"  // the LTS version currently used in the build
+  def scala3Lts        = s"$scala3LtsPrefix.6-RC1"  // the LTS version currently used in the build
   def scala3NextPrefix = "3.6"
   def scala3Next       = s"$scala3NextPrefix.4" // the newest/next version of Scala
   def scala3NextAnnounced   = scala3Next   // the newest/next version of Scala that's been announced