Bump com.icegreen:greenmail in the development-dependencies group (#9811)

Bumps the development-dependencies group with 1 update: [com.icegreen:greenmail](https://github.com/greenmail-mail-test/greenmail).


Updates `com.icegreen:greenmail` from 2.1.2 to 2.1.3
- [Release notes](https://github.com/greenmail-mail-test/greenmail/releases)
- [Commits](https://github.com/greenmail-mail-test/greenmail/compare/release-2.1.2...release-2.1.3)

---
updated-dependencies:
- dependency-name: com.icegreen:greenmail
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

build.gradle

@@ -70,7 +70,7 @@ ext {
     derbyVersion = '10.16.1.1'
     ftpServerVersion = '1.2.1'
     graalvmVersion = '24.1.2'
-    greenmailVersion = '2.1.2'
+    greenmailVersion = '2.1.3'
     groovyVersion = '4.0.25'
     hamcrestVersion = '3.0'
     hazelcastVersion = '5.4.0'