build(deps): bump vim/bundle/gruvbox from bf2885a to f1ecde8

Bumps [vim/bundle/gruvbox](https://github.com/morhetz/gruvbox) from `bf2885a` to `f1ecde8`.
- [Release notes](https://github.com/morhetz/gruvbox/releases)
- [Commits](morhetz/gruvbox@bf2885a...f1ecde8)

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

Signed-off-by: dependabot[bot] <[email protected]>