chore(deps): bump zsh-abbr from 13b34cd to 644e230 (#984)

Bumps [custom/plugins/zsh-abbr](https://github.com/olets/zsh-abbr) from `13b34cd` to `644e230`.
- [Release notes](https://github.com/olets/zsh-abbr/releases)
- [Commits](olets/zsh-abbr@13b34cd...644e230)

---
updated-dependencies:
- dependency-name: custom/plugins/zsh-abbr
  dependency-version: 644e230c51aaf8aac01267a0f5c0f92ba001b700
  dependency-type: direct:production
...

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

Author: dependabot[bot]