Include default JMH version in benchmarking options' help

Author: Gedochao

modules/cli/src/main/scala/scala/cli/commands/shared/BenchmarkingOptions.scala

@@ -2,6 +2,7 @@ package scala.cli.commands.shared
 
 import caseapp.*
 
+import scala.build.internal.Constants
 import scala.cli.commands.tags
 
 // format: off
@@ -12,7 +13,7 @@ final case class BenchmarkingOptions(
     jmh: Option[Boolean] = None,
   @Group(HelpGroup.Benchmarking.toString)
   @Tag(tags.experimental)
-  @HelpMessage("Set JMH version")
+  @HelpMessage(s"Set JMH version (default: ${Constants.jmhVersion})")
   @ValueDescription("version")
     jmhVersion: Option[String] = None
 )

website/docs/reference/cli-options.md

@@ -56,7 +56,7 @@ Run JMH benchmarks
 
 ### `--jmh-version`
 
-Set JMH version
+Set JMH version (default: 1.37)
 
 ## Compilation server options