prepare changelog prior to release

[Byron]

Tasks

• make release
• update github releases

[Copilot]

Pull request overview

Prepares the repository for the 3.1.59 release by bumping the package version and updating the changelog’s security advisory references for that release.

Changes:

• Bump VERSION from 3.1.58 to 3.1.59.
• Add additional GitHub Security Advisory links under the 3.1.59 changelog entry.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
VERSION	Updates the project version to 3.1.59 for the upcoming release.
doc/source/changes.rst	Adds the missing 3.1.59 security advisory links in the changelog.

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[Byron]

Merged early as only VERSION and changes.rst failed, CI failure isn't expected.