ui-dev: bump net-imap in /server/src/main/webapp/WEB-INF/rails

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.4.4 to 0.4.5.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.4.4...v0.4.5)

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

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

Author: dependabot[bot]

server/src/main/webapp/WEB-INF/rails/Gemfile.lock

@@ -106,7 +106,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     minitest (5.20.0)
-    net-imap (0.4.4)
+    net-imap (0.4.5)
       date
       net-protocol
     net-pop (0.1.2)