Bump the dev-deps group with 2 updates

Updates the requirements on [msgpack](https://github.com/msgpack/msgpack-python) and [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.

Updates `msgpack` 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@v1.1.0...v1.2.1)

Updates `pytest` to 9.1.1
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@9.0.0...9.1.1)

---
updated-dependencies:
- dependency-name: msgpack
  dependency-version: 1.2.1
  dependency-type: direct:development
  dependency-group: dev-deps
- dependency-name: pytest
  dependency-version: 9.1.1
  dependency-type: direct:development
  dependency-group: dev-deps
...

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

Author: dependabot[bot]

pyproject.toml

@@ -78,7 +78,7 @@ viewer = [
     "windows-curses; platform_system == 'Windows' and platform_python_implementation=='CPython'"
 ]
 mf4 = ["asammdf>=6.0.0"]
-multicast = ["msgpack~=1.1.0"]
+multicast = ["msgpack~=1.2.1"]
 
 [dependency-groups]
 docs = [
@@ -96,7 +96,7 @@ lint = [
     "mypy==2.1.*",
 ]
 test = [
-    "pytest==9.0.*",
+    "pytest==9.1.*",
     "pytest-timeout==2.4.*",
     "pytest-modern==0.7.*;platform_system!='Windows'",
     "coveralls==4.1.*",