runtime: Remove Brams name from a few more runtime files (#12780)

syntax/model.vim: minor wording improvement

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Adri Verhoef <a3@a3.xs4all.nl>
diff --git a/runtime/syntax/zimbu.vim b/runtime/syntax/zimbu.vim
index 1a7a485..4725595 100644
--- a/runtime/syntax/zimbu.vim
+++ b/runtime/syntax/zimbu.vim
@@ -1,7 +1,8 @@
 " Vim syntax file
 " Language:	Zimbu
-" Maintainer:	Bram Moolenaar
-" Last Change:	2014 Nov 23
+" Maintainer:	The·Vim·Project·<https://github.com/vim/vim>
+" Last Change:	2023 Aug 13
+" Note: 	Zimbu seems to be dead :(
 
 if exists("b:current_syntax")
   finish