runtime(compiler): add comment for Dispatch

closes: #16854

Signed-off-by: Konfekt <Konfekt@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/compiler/javac.vim b/runtime/compiler/javac.vim
index 53cd772..d4f24cd 100644
--- a/runtime/compiler/javac.vim
+++ b/runtime/compiler/javac.vim
@@ -2,6 +2,7 @@
 " Compiler:	Java Development Kit Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
 " Last Change:	2024 Nov 19 (enable local javac_makeprg_params)
+" 		2025 Mar 11 (add comment for Dispatch)
 
 if exists("current_compiler")
   finish
@@ -11,6 +12,7 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
+" CompilerSet makeprg=javac
 execute $'CompilerSet makeprg=javac\ {escape(get(b:, 'javac_makeprg_params', get(g:, 'javac_makeprg_params', '')), ' \|"')}'
 
 CompilerSet errorformat=%E%f:%l:\ error:\ %m,