Vim: v9.1.0981

* vim 14ede1890...f27e80a6e (11):
  > runtime(vim): update vim generator syntax script
  > patch 9.1.0981: tests: typo in test_filetype.vim
  > patch 9.1.0980: no support for base64 en-/decoding functions in Vim Script
  > syntax(sh): Improve the recognition of bracket expressions
  > runtime(doc): mention how NUL bytes are handled
  > patch 9.1.0979: VMS: type warning with $XDG_VIMRC_FILE
  > patch 9.1.0978: GUI tests sometimes fail when setting 'scroll' options
  > patch 9.1.0977: filetype: msbuild filetypes are not recognized
  > patch 9.1.0976: Vim9: missing return statement with throw
  > patch 9.1.0975: Vim9: interpolated string expr not working in object methods
  > patch 9.1.0974: typo in change of commit v9.1.0873

https://github.com/vim/vim-appimage/actions/runs/12553912509