Update mashumaro[msgpack] requirement in /core

Updates the requirements on [mashumaro[msgpack]](https://github.com/Fatal1ty/mashumaro) to permit the latest version.
- [Release notes](https://github.com/Fatal1ty/mashumaro/releases)
- [Commits](Fatal1ty/mashumaro@v3.7...v3.8)

---
updated-dependencies:
- dependency-name: mashumaro[msgpack]
  dependency-type: direct:production
...

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

core/setup.py

@@ -51,7 +51,7 @@
         # Pin to the patch or minor version, and bump in each new minor version of dbt-core.
         "agate~=1.7.0",
         "Jinja2~=3.1.2",
-        "mashumaro[msgpack]~=3.7.0",
+        "mashumaro[msgpack]>=3.7,<3.9",
         # ----
         # Legacy: This package has not been updated since 2019, and it is unused in dbt's logging system (since v1.0)
         # The dependency here will be removed along with the removal of 'legacy logging', in a future release of dbt-core