build(deps): Bump multipart-post from 2.4.0 to 2.4.1

Bumps [multipart-post](https://github.com/socketry/multipart-post) from 2.4.0 to 2.4.1.
- [Release notes](https://github.com/socketry/multipart-post/releases)
- [Changelog](https://github.com/socketry/multipart-post/blob/main/changelog.md)
- [Commits](socketry/multipart-post@v2.4.0...v2.4.1)

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

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

Gemfile.lock

@@ -211,7 +211,7 @@ GEM
     msgpack (1.7.2)
     multi_xml (0.7.1)
       bigdecimal (~> 3.1)
-    multipart-post (2.4.0)
+    multipart-post (2.4.1)
     mutex_m (0.2.0)
     net-imap (0.4.10)
       date