Merge pull request #3884 from oleg-nenashev/sshd/2.6

[JENKINS-55978] - Update SSHD Module to 2.6 to pick up the Apache MINA idle timeout custom property fix

war/pom.xml

@@ -130,7 +130,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>org.jenkins-ci.modules</groupId>
       <artifactId>sshd</artifactId>
-      <version>2.5</version>
+      <version>2.6</version>
     </dependency>
     <dependency>
       <groupId>org.jenkins-ci.ui</groupId>