chore(deps): bump custom/plugins/zsh-abbr from fd26ff1 to 20024bd

Bumps [custom/plugins/zsh-abbr](https://github.com/olets/zsh-abbr) from `fd26ff1` to `20024bd`.
- [Release notes](https://github.com/olets/zsh-abbr/releases)
- [Commits](olets/zsh-abbr@fd26ff1...20024bd)

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

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