Build(deps): Bump msgpack from 1.7.2 to 1.7.3 (#29091)

Bumps [msgpack](https://github.com/msgpack/msgpack-ruby) from 1.7.2 to 1.7.3.
- [Changelog](https://github.com/msgpack/msgpack-ruby/blob/master/ChangeLog)
- [Commits](https://github.com/msgpack/msgpack-ruby/compare/v1.7.2...v1.7.3)

---
updated-dependencies:
- dependency-name: msgpack
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -254,7 +254,7 @@ GEM
     minitest (5.25.1)
     mocha (2.4.5)
       ruby2_keywords (>= 0.0.5)
-    msgpack (1.7.2)
+    msgpack (1.7.3)
     multi_json (1.15.0)
     multi_xml (0.7.1)
       bigdecimal (~> 3.1)