chore: release v9.0.0-pre2.1

[Pr0methean]

🤖 New release

• zip: 9.0.0-pre2 -> 9.0.0-pre2.1 (✓ API compatible changes)

Changelog

9.0.0-pre2.1 - 2026-06-09

🚀 Features

• add method to README (#857)

🚜 Refactor

• change zip64 parsing (#834)

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This PR was generated with release-plz.

[gemini-code-assist]

Code Review

This pull request updates the project version to 9.0.0-pre2.1 in Cargo.toml and documents the corresponding release notes in CHANGELOG.md. There are no review comments, and I have no feedback to provide.

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[amazon-q-developer]

This release PR updates the version to 9.0.0-pre2.1 and adds corresponding changelog entries. However, there is a critical issue with the release date that must be corrected before merging.

Critical Issue:

• The release date is set to 2026-06-09, which is in the future and creates incorrect historical documentation

Please correct the date to reflect the actual release date.

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[amazon-q-developer]

🛑 Logic Error: Release date is set to a future date (2026-06-09). This creates incorrect historical documentation and must be corrected to the actual release date.

Suggested change

	## [9.0.0-pre2.1](https://github.com/zip-rs/zip2/compare/v9.0.0-pre2...v9.0.0-pre2.1) - 2026-06-09
	## [9.0.0-pre2.1]( - 2025-06-09