Update syntax/dosini.vim to the latest version (#12764)

[Christian Brabandt]

Update syntax/dosini.vim to the latest version (#12764)

Commit: https://github.com/vim/vim/commit/dd0ad2598898c2b4641c4acd5b70b6184fa698ed
Author: Hong Xu <ho...@topbug.net>
Date: Fri Aug 11 10:29:20 2023 -0700

Update syntax/dosini.vim to the latest version (https://github.com/vim/vim/issues/12764)

The latest version is in https://github.com/xuhdev/syntax-dosini.vim/blob/master/syntax/dosini.vim. I've sent the file to Bram at the end of June, unfortunately it wasn't able to make into the Vim repository. RIP!

diff --git a/runtime/syntax/dosini.vim b/runtime/syntax/dosini.vim
index cf42819bc..751a12f4b 100644
--- a/runtime/syntax/dosini.vim
+++ b/runtime/syntax/dosini.vim
@@ -1,12 +1,12 @@
" Vim syntax file
" Language: Configuration File (ini file) for MSDOS/MS Windows
-" Version: 2.2
+" Version: 2.3
" Original Author: Sean M. McKee <mc...@misslink.net>
" Previous Maintainer: Nima Talebi <ni...@it.net.au>
" Current Maintainer: Hong Xu <ho...@topbug.net>
" Homepage: http://www.vim.org/scripts/script.php?script_id=3747
" Repository: https://github.com/xuhdev/syntax-dosini.vim
-" Last Change: 2018 Sep 11
+" Last Change: 2023 Jun 27


" quit when a syntax file was already loaded
@@ -24,6 +24,8 @@ syn match dosiniNumber "=\zs\s*\d*\.\d\+\s*$"
syn match dosiniNumber "=\zs\s*\d\+e[+-]\=\d\+\s*$"
syn region dosiniHeader start="^\s*\[" end="\]"
syn match dosiniComment "^[#;].*$"
+syn region dosiniSection start="\s*\[.*\]" end="\ze\s*\[.*\]" fold
+ \ contains=dosiniLabel,dosiniValue,dosiniNumber,dosiniHeader,dosiniComment

" Define the default highlighting.
" Only when an item doesn't have highlighting yet