runtime(vim): Update base-syntax, add legacy header folding Commit: https://github.com/vim/vim/commit/ce06493aeb3d198d13de289ac39d1ed0f1604429 Author: Doug Kearns <dougkearns@gmail.com> Date: Sat Apr 13 18:24:01 2024 +0200 runtime(vim): Update base-syntax, add legacy header folding Allow for syntax-based folding of Vim9 script legacy header regions. This is enabled with the "H" flag of the g:vimsyn_folding config variable. closes: #14530 Signed-off-by: Christian Brabandt <cb@256bit.org> Signed-off-by: Doug Kearns <dougkearns@gmail.com>