Fix Scala download links

Author: WojciechMazur

cli/src/sbt-test/integration/standalone/build.sbt

@@ -47,9 +47,9 @@ runScript := {
     if (!scalaBinDir.exists) {
       val downloadUrl =
         if (ver.startsWith("3."))
-          s"https://github.com/lampepfl/dotty/releases/download/$ver/$scalaDir.zip"
+          s"https://github.com/scala/scala3/releases/download/$ver/$scalaDir.zip"
         else
-          s"https://downloads.lightbend.com/scala/${ver}/$scalaDir.zip"
+          s"https://github.com/scala/scala/releases/download/scala/v$ver/$scalaDir.zip"
       IO.unzipURL(url(downloadUrl), cacheDir)
     }
     // Make sure we can execute scala/scalac from downloaded distro