build(deps): Bump msgpack from 1.7.3 to 1.7.5

Bumps [msgpack](https://github.com/msgpack/msgpack-ruby) from 1.7.3 to 1.7.5.
- [Changelog](https://github.com/msgpack/msgpack-ruby/blob/master/ChangeLog)
- [Commits](msgpack/msgpack-ruby@v1.7.3...v1.7.5)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -140,7 +140,7 @@ GEM
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
     minitest (5.25.1)
-    msgpack (1.7.3)
+    msgpack (1.7.5)
     net-imap (0.4.17)
       date
       net-protocol