Bump net-imap in the bundler group across 1 directory (#2039)

Bumps the bundler group with 1 update in the / directory: [net-imap](https://github.com/ruby/net-imap).


Updates `net-imap` from 0.6.3 to 0.6.4
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.6.3...v0.6.4)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-version: 0.6.4
  dependency-type: indirect
  dependency-group: bundler
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -353,7 +353,7 @@ GEM
       bigdecimal (>= 3.1, < 5)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    net-imap (0.6.3)
+    net-imap (0.6.4)
       date
       net-protocol
     net-pop (0.1.2)