Bump .zprezto from 9626ce2 to 427268c

Bumps [.zprezto](https://github.com/sorin-ionescu/prezto) from `9626ce2` to `427268c`.
- [Commits](sorin-ionescu/prezto@9626ce2...427268c)

---
updated-dependencies:
- dependency-name: ".zprezto"
  dependency-type: direct:production
...

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