build(deps): bump vim/bundle/vim-airline from 81eca99 to 3ddcab1 (#…

…2034)

Bumps [vim/bundle/vim-airline](https://github.com/vim-airline/vim-airline) from `81eca99` to `3ddcab1`.
- [Release notes](https://github.com/vim-airline/vim-airline/releases)
- [Commits](vim-airline/vim-airline@81eca99...3ddcab1)

---
updated-dependencies:
- dependency-name: vim/bundle/vim-airline
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>