[chore] Set reference version to 3.7.4 (#24348)

Author: WojciechMazur

project/Build.scala

@@ -59,7 +59,7 @@ object Build {
    *
    *  Warning: Change of this variable needs to be consulted with `expectedTastyVersion`
    */
-  val referenceVersion = "3.7.4-RC3"
+  val referenceVersion = "3.7.4"
 
   /** Version of the Scala compiler targeted in the current release cycle
    *  Contains a version without RC/SNAPSHOT/NIGHTLY specific suffixes
@@ -1472,7 +1472,7 @@ object Build {
     .enablePlugins(ScriptedPlugin)
     .aggregate(`scala3-interfaces`, `scala3-library-bootstrapped-new` , `scala-library-bootstrapped`,
       `tasty-core-bootstrapped-new`, `scala3-compiler-bootstrapped-new`, `scala3-sbt-bridge-bootstrapped`,
-      `scala3-staging-new`, `scala3-tasty-inspector-new`, `scala-library-sjs`, `scala3-library-sjs`, 
+      `scala3-staging-new`, `scala3-tasty-inspector-new`, `scala-library-sjs`, `scala3-library-sjs`,
       `scaladoc-new`, `scala3-repl`)
     .settings(
       name          := "scala3-bootstrapped",