Build(deps): Bump msgpack from 1.7.1 to 1.7.2 in /Builder

Bumps [msgpack](https://github.com/msgpack/msgpack-ruby) from 1.7.1 to 1.7.2.
- [Changelog](https://github.com/msgpack/msgpack-ruby/blob/master/ChangeLog)
- [Commits](msgpack/msgpack-ruby@v1.7.1...v1.7.2)

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

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

Builder/Gemfile.lock

@@ -126,7 +126,7 @@ GEM
     mini_mime (1.1.2)
     mini_portile2 (2.8.2)
     minitest (5.18.1)
-    msgpack (1.7.1)
+    msgpack (1.7.2)
     net-imap (0.3.6)
       date
       net-protocol