build(deps): bump msgpack from 1.8.3 to 1.8.4

Bumps [msgpack](https://github.com/msgpack/msgpack-ruby) from 1.8.3 to 1.8.4.
- [Changelog](https://github.com/msgpack/msgpack-ruby/blob/master/ChangeLog)
- [Commits](msgpack/msgpack-ruby@v1.8.3...v1.8.4)

---
updated-dependencies:
- dependency-name: msgpack
  dependency-version: 1.8.4
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -154,7 +154,7 @@ GEM
       prism (~> 1.5)
     mock_redis (0.55.0)
       redis (~> 5)
-    msgpack (1.8.3)
+    msgpack (1.8.4)
     multi_json (1.21.1)
     multipart-parser (0.1.1)
     mustache (1.1.2)