Bump net-imap from 0.6.4 to 0.6.4.1

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.6.4 to 0.6.4.1.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](https://github.com/ruby/net-imap/compare/v0.6.4...v0.6.4.1)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-version: 0.6.4.1
  dependency-type: indirect
...

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

Gemfile.lock

@@ -853,7 +853,7 @@ GEM
       mustermann (>= 1.0.0)
     net-http (0.9.1)
       uri (>= 0.11.1)
-    net-imap (0.6.4)
+    net-imap (0.6.4.1)
       date
       net-protocol
     net-ldap (0.20.0)
@@ -2030,7 +2030,7 @@ CHECKSUMS
   mustermann-grape (1.1.0) sha256=8d258a986004c8f01ce4c023c0b037c168a9ed889cf5778068ad54398fa458c5
   my_page (1.0.0)
   net-http (0.9.1) sha256=25ba0b67c63e89df626ed8fac771d0ad24ad151a858af2cc8e6a716ca4336996
-  net-imap (0.6.4) sha256=9a5598c67a3022c284d98430ef1d4948e7dbdb62596f61081ea8ca933270a02b
+  net-imap (0.6.4.1) sha256=29f0360d75a7efd3539f16ac1957dea5c0a51ddeceb348db4553c3120914ea0d
   net-ldap (0.20.0) sha256=b2080b350753a9ac4930869ded8e61a1d2151c01e03b0bf07b4675cbd9ce5372
   net-pop (0.1.2) sha256=848b4e982013c15b2f0382792268763b748cce91c9e91e36b0f27ed26420dff3
   net-protocol (0.2.2) sha256=aa73e0cba6a125369de9837b8d8ef82a61849360eba0521900e2c3713aa162a8