RFR: 8326351: Update the Zlib version in open/src/java.base/share/legal/zlib.md to 1.3.1

Tue Feb 20 20:07:54 UTC 2024

On Tue, 20 Feb 2024 19:56:53 GMT, Lance Andersen <lancea at openjdk.org> wrote:

> Please review the updates to open/src/java.base/share/legal/zlib.md to update the file  from zlib 1.2.13 to zlib 1.3.1 which was missed as part of the PR for [JDK-8324632](https://bugs.openjdk.org/browse/JDK-8324632)

Marked as reviewed by iris (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17935#pullrequestreview-1891486155