Bump sshd-core from 2.9.1 to 2.9.2 (#558)

Bumps [sshd-core](https://github.com/apache/mina-sshd) from 2.9.1 to 2.9.2.
- [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-2.9.1...sshd-2.9.2)

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

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build.gradle.kts

@@ -80,7 +80,7 @@ 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:2.9.1")
+    testImplementation("org.apache.sshd:sshd-core:2.9.2")
     testImplementation("org.apache.sshd:sshd-git:2.9.1")
     testImplementation(gradleTestKit())
 }