Bump coursier to 2.1.25-M21 (was 2.1.25-M19)

[Cherry-picked 035cdc3]

Author: Gedochao

project/Build.scala

@@ -137,7 +137,7 @@ object Build {
   /** Version of Scala CLI to download */
   val scalaCliLauncherVersion = "1.11.0"
   /** Version of Coursier to download for initializing the local maven repo of Scala command */
-  val coursierJarVersion = "2.1.25-M19"
+  val coursierJarVersion = "2.1.25-M21"
 
   object CompatMode {
     final val BinaryCompatible = 0