Bump net-imap from 0.5.1 to 0.5.6

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.5.1 to 0.5.6.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.5.1...v0.5.6)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-type: indirect
...

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

Gemfile.lock

@@ -115,7 +115,7 @@ GEM
     crass (1.0.6)
     csv (3.3.0)
     daemon-spawn (0.4.2)
-    date (3.4.0)
+    date (3.4.1)
     domain_name (0.6.20240107)
     drb (2.2.1)
     erb (4.0.4)
@@ -179,7 +179,7 @@ GEM
       ruby2_keywords (~> 0.0.1)
     natto (1.2.0)
       ffi (>= 1.9.0)
-    net-imap (0.5.1)
+    net-imap (0.5.6)
       date
       net-protocol
     net-pop (0.1.2)
@@ -312,7 +312,7 @@ GEM
     time (0.4.1)
       date
     timecop (0.9.10)
-    timeout (0.4.2)
+    timeout (0.4.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.6.0)