Bump org.apache.sshd:sshd-core from 2.11.0 to 2.12.0 (#701)

Bumps [org.apache.sshd:sshd-core](https://github.com/apache/mina-sshd) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/apache/mina-sshd/releases)
- [Changelog](https://github.com/apache/mina-sshd/blob/master/CHANGES.md)
- [Commits](apache/mina-sshd@sshd-2.11.0...sshd-2.12.0)

---
updated-dependencies:
- dependency-name: org.apache.sshd:sshd-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle.kts

@@ -78,7 +78,7 @@ dependencies {
     testImplementation("org.spockframework:spock-core:2.2-groovy-2.5")
     testImplementation("cglib:cglib-nodep:3.3.0")
     testImplementation("org.objenesis:objenesis:3.3")
-    testImplementation("org.apache.sshd:sshd-core:2.11.0")
+    testImplementation("org.apache.sshd:sshd-core:2.12.0")
     testImplementation("org.apache.sshd:sshd-git:2.12.0")
     testImplementation(gradleTestKit())
 }