chore(deps): bump vendor/prezto from 1875ddb to 5666927 (#538)

Bumps [vendor/prezto](https://github.com/sorin-ionescu/prezto) from `1875ddb` to `5666927`.
- [Commits](sorin-ionescu/prezto@1875ddb...5666927)

---
updated-dependencies:
- dependency-name: vendor/prezto
  dependency-version: 56669270988c5e32422643ec9e0562d1f3c6a0b8
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]