patch 9.1.1289: tests: no test for matchparen plugin with WinScrolled event

Problem:  tests: no test for matchparen plugin with WinScrolled event
Solution: add missing test

closes: #10942

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/plugin/matchparen.vim b/runtime/plugin/matchparen.vim
index 1c8c9f3..562148c 100644
--- a/runtime/plugin/matchparen.vim
+++ b/runtime/plugin/matchparen.vim
@@ -1,6 +1,6 @@
 " Vim plugin for showing matching parens
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2025 Mar 14
+" Last Change:	2025 Apr 08
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Exit quickly when: