Vim: v9.1.0988

* vim 663d18d61...cd96075cd (9):
  > runtime(java): Quietly opt out for unsupported markdown.vim versions
  > runtime(vim): fix failing vim syntax test
  > patch 9.1.0988: Vim9: no error when using uninitialized var in new()
  > runtime(doc): update index.txt
  > patch 9.1.0987: filetype: cake files are not recognized
  > patch 9.1.0986: filetype: 'jj' filetype is a bit imprecise
  > runtime(jj): Support diffs in jj syntax
  > runtime(vim): Update matchit pattern, no Vim9 short names
  > patch 9.1.0985: Vim9: some ex commands can be shortened

https://github.com/vim/vim-appimage/actions/runs/12606072977