Vim: v9.1.1766

* vim b2113e511...115b5338d (5):
  > runtime(kitty): Fix typo in syntax file for kitty
  > patch 9.1.1766: Vim9: some functions do not handle null_string correctly
  > runtime(doc): Tweak doc style in syntax.txt
  > runtime(doc): mention generic log highlighter
  > runtime(doc): fix doc style from commit 5c9b71d63c1

https://github.com/vim/vim-appimage/actions/runs/17783468947

Author: github-actions[bot]