Bump msgpack from 1.1.2 to 1.2.1

Bumps [msgpack](https://github.com/msgpack/msgpack-python) from 1.1.2 to 1.2.1.
- [Release notes](https://github.com/msgpack/msgpack-python/releases)
- [Changelog](https://github.com/msgpack/msgpack-python/blob/main/CHANGELOG.md)
- [Commits](msgpack/msgpack-python@v1.1.2...v1.2.1)

---
updated-dependencies:
- dependency-name: msgpack
  dependency-version: 1.2.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -19,7 +19,7 @@ dependencies = [
     "hy (>=1.0.0)",
     "urllib3>=2.7.0",
     "pyzmq (>=26.2.1)",
-    "msgpack (>=1.1.0)",
+    "msgpack>=1.2.1",
     "colorama (>=0.4.6)",
     "glom (>=24.11.0)",
     "flask-cors (>=5.0.1)",