Bump vim/bundle/vim-airline from `b6f6cc9` to `a8b3c25`
Bump vim/bundle/vim-airline from `b6f6cc9` to `a8b3c25`

Bumps [vim/bundle/vim-airline](https://github.com/vim-airline/vim-airline) from `b6f6cc9` to `a8b3c25`.
- [Release notes](https://github.com/vim-airline/vim-airline/releases)
- [Commits](https://github.com/vim-airline/vim-airline/compare/b6f6cc93121678aa1a6dda32c5711a2b5a6e8dad...a8b3c254d0e5c43be24298ce16cd01f740fe8d42)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
doot/dotfiles,doot/dotfiles