Build(deps): Bump net-imap from 0.3.0 to 0.3.1 (#18432)

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](https://github.com/ruby/net-imap/compare/v0.3.0...v0.3.1)

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

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -240,7 +240,7 @@ GEM
     mustache (1.1.1)
     net-http (0.2.2)
       uri
-    net-imap (0.3.0)
+    net-imap (0.3.1)
       net-protocol
     net-pop (0.1.2)
       net-protocol