Help/dev: Update UseJava export policy version in post-release development

Help/dev/maint.rst

@@ -332,15 +332,16 @@ Commit with a message such as::
   away from setting policies to OLD.
 
 Update the ``cmake_policy`` version range generated by ``install(EXPORT)``
-in ``cmExportFileGenerator::GeneratePolicyHeaderCode`` to end at the
+in ``cmExportFileGenerator::GeneratePolicyHeaderCode`` and
+``install_jar_exports`` in ``javaTargets.cmake.in`` to end at the
 previous release.  We use one release back since we now know all the
 policies added for that version.  Commit with a message such as::
 
   export: Increase maximum policy version in exported files to $prev
 
-  The files generated by `install(EXPORT)` and `export()` commands
-  are known to work with policies as of CMake $prev, so enable them
-  in sufficiently new CMake versions.
+  The files generated by `install(EXPORT)`, `export()`, and
+  `install_jar_exports()` commands are known to work with policies
+  as of CMake $prev, so enable them in sufficiently new CMake versions.
 
 Update the ``cmake_minimum_required`` version range in CMake itself: