Update dependency org.apache.sshd:sshd-core to v2.15.0

Author: renovate[bot]

pom.xml

@@ -94,7 +94,7 @@
     <dependency>
       <groupId>org.apache.sshd</groupId>
       <artifactId>sshd-core</artifactId>
-      <version>2.14.0</version>
+      <version>2.15.0</version>
       <optional>true</optional>
     </dependency>
     <dependency>