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/indent/mail.vim b/runtime/indent/mail.vim
index 22bb0f7..eec9b4e 100644
--- a/runtime/indent/mail.vim
+++ b/runtime/indent/mail.vim
@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:	Mail
-" Maintainer:	Bram Moolenaar
-" Last Change:	2021 Sep 26
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2023 Aug 13
 
 if exists("b:did_indent")
   finish