Update dependency msgpack to v1.1.2

This MR contains the following updates:

Package	Type	Update	Change
msgpack (changelog)	ironbank-pypi	patch	1.1.0 -> 1.1.2

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Release Notes

msgpack/msgpack-python (msgpack)

v1.1.2

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Release Date: 2025-10-08

This release does not change source code. It updates only building wheels:

• Update Cython to v3.1.4
• Update cibuildwheel to v3.2.0
• Drop Python 3.8
• Add Python 3.14
• Add windows-arm

v1.1.1

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Release Date: 2025-06-13

• No change from 1.1.1rc1.

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