add note about refactoring.

We expect no changes, but we might as well call it out.

docs/notes/2.22.x.md

@@ -42,6 +42,8 @@ targets generator from `pom.xml`.
 
 Exclusions for `jvm_artifact` and `scala_artifact` now correctly handle a `jvm_exclude` with only the group defined.
 
+The internal code for exporting JVM tools was refactored.
+
 ##### Scala
 
 Setting the `orphan_files_behaviour = "ignore"` option for [`pants.backend.experimental.scala.lint.scalafix`](https://www.pantsbuild.org/2.22/reference/subsystems/scalafix#orphan_files_behavior) or [`pants.backend.experimental.scala.lint.scalafmt`](https://www.pantsbuild.org/2.22/reference/subsystems/scalafmt#orphan_files_behavior) backend is now properly silent. It previously showed spurious warnings.