[54.2.0_maintenance] Bump arrow version to 54.2.1

[Xuanwo]

Which issue does this PR close?

• Part of Release arrow-rs / parquet minor version 54.3.0 (Mar 2025) #7107
• Release arrow-rs / parquet patch version 54.2.1 (Feb 2025) (HOTFIX) #7209

Rationale for this change

Get a patch release so we can avoid breaking after new chrono release.

What changes are included in this PR?

Version and changelog bumps.

Are there any user-facing changes?

None

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I request that this release be made under emergency circumstances, allowing it to be released as soon as possible after gathering three +1 binding votes, without waiting for three days.

[Xuanwo]

cc @alamb, I'm open to change this release to 54.3.0 instead.

[tustvold]

Thank you for this, i think we should instead backport the chrono fix onto the last release instead of releasing from main. Less risk that way if we're going to shortcut the release process

[Xuanwo]

Thank you for this, i think we should instead backport the chrono fix onto the last release instead of releasing from main. Less risk that way if we're going to shortcut the release process

Looks good to me. Would you like to create a branch from 54.2.0 tag for me to backport the fix?

[tustvold]

I've created https://github.com/apache/arrow-rs/tree/54.2.0_maintenance

[Xuanwo]

I've created https://github.com/apache/arrow-rs/tree/54.2.0_maintenance

Thank you for this.

[Xuanwo]

This PR is ready to go.

[alamb]

I will plan to do the release / public discussion / writeup about this

[alamb]

Thank you @Xuanwo and @tustvold

I will now prepare a release candidate