⬆️ Update pytz to v2026

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
pytz	==2023.3.post1 → ==2026.2

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[florianhorner]

Dependency update — LGTM.

[basnijholt]

Sorry it took me so long to get to this. I've been a bit overwhelmed by the number of AI-assisted PRs opened here recently, and I've also been spending nearly every spare hour on my biggest project so far, MindRoom.

I'm very supportive of using AI for coding, but many of these PRs still need careful human review because even plausible-looking changes can introduce subtle breakage. That backlog made me postpone reviewing them for a while.

I've now done a batch review with Codex / GPT-5.5 (xhigh). This comment is AI-assisted, but I've reviewed it before posting.

This looks like the current pytz update to keep, assuming CI is green.

This also supersedes the older abandoned pytz v2025 PR (#1173), so I would close #1173 once this one is merged or otherwise resolved.