chore(deps): bump zsh-abbr from 4facba3 to 899f477

Bumps [custom/plugins/zsh-abbr](https://github.com/olets/zsh-abbr) from `4facba3` to `899f477`.
- [Release notes](https://github.com/olets/zsh-abbr/releases)
- [Commits](olets/zsh-abbr@4facba3...889f477)
1231c82aa631d11874f86faad70ae87a8414bff2...4facba32711875fb2049720a0f6d6d5c3b56b986)

---
updated-dependencies:
- dependency-name: custom/plugins/zsh-abbr
  dependency-version: 889f4772c12b9dbe4965bbd56f2572af0a28fa3b
  dependency-type: direct:production
...

Signed-off-by: Lucas Larson <LucasLarson@riseup.net>

Author: LucasLarson