Bump sshd-core from 2.7.0 to 2.8.0

Bumps [sshd-core](https://github.com/apache/mina-sshd) from 2.7.0 to 2.8.0.
- [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-2.7.0...sshd-2.8.0)

---
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]>

Author: dependabot[bot]

pom.xml

@@ -57,7 +57,7 @@
         <!--dependencies-->
         <spring-boot.version>2.5.6</spring-boot.version>
         <spring-shell.version>2.0.1.RELEASE</spring-shell.version>
-        <sshd.version>2.7.0</sshd.version>
+        <sshd.version>2.8.0</sshd.version>
         <junit-jupiter.version>5.8.1</junit-jupiter.version>
         <!--sonar-->
         <sonar.projectKey>fonimus_ssh-shell-spring-boot</sonar.projectKey>