Bump multipart-post from 2.2.2 to 2.2.3

Bumps [multipart-post](https://github.com/socketry/multipart-post) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/socketry/multipart-post/releases)
- [Changelog](https://github.com/socketry/multipart-post/blob/main/CHANGELOG.md)
- [Commits](socketry/multipart-post@v2.2.2...v2.2.3)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -25,7 +25,7 @@ GEM
     http_parser.rb (0.6.0)
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
-    multipart-post (2.2.2)
+    multipart-post (2.2.3)
     naught (1.1.0)
     optimist (3.0.1)
     public_suffix (4.0.7)