Set TASTy version to 28.8-experimental-1 acording to procedure. Revert scala#23093

Author: WojciechMazur

project/Build.scala

@@ -141,9 +141,8 @@ object Build {
    *      - in release candidate branch is experimental if {patch == 0}
    *      - in stable release is always non-experimetnal
    */
-  val expectedTastyVersion = "28.7-experimental-1"
-  // TODO: Restore test when upgrading reference compiler to 3.7.0 stable
-  // checkReleasedTastyVersion()
+  val expectedTastyVersion = "28.8-experimental-1"
+  checkReleasedTastyVersion()
 
   /** Final version of Scala compiler, controlled by environment variables. */
   val dottyVersion = {

tasty/src/dotty/tools/tasty/TastyFormat.scala

@@ -324,7 +324,7 @@ object TastyFormat {
    *  compatibility, but remains backwards compatible, with all
    *  preceding `MinorVersion`.
    */
-  final val MinorVersion: Int = 7
+  final val MinorVersion: Int = 8
 
   /** Natural Number. The `ExperimentalVersion` allows for
    *  experimentation with changes to TASTy without committing