update zlib to 3.2.3

Stefan Kahnrequested to merge
skahn-bump-zlib into master

What does this MR do and why?

This MR updates zlib to 3.2.3 to resolve CVE-2026-27820. #596593 (closed)

References

buffer-overflow-zlib-cve-2026-27820

Screenshots or screen recordings

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How to set up and validate locally

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