Bump ssh-cli-auth from 1.4 to 1.8

Bumps [ssh-cli-auth](https://github.com/jenkinsci/ssh-cli-auth-module) from 1.4 to 1.8.
- [Release notes](https://github.com/jenkinsci/ssh-cli-auth-module/releases)
- [Commits](jenkinsci/ssh-cli-auth-module@ssh-cli-auth-1.4...ssh-cli-auth-1.8)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -49,7 +49,7 @@
     <dependency>
       <groupId>org.jenkins-ci.modules</groupId>
       <artifactId>ssh-cli-auth</artifactId>
-      <version>1.4</version>
+      <version>1.8</version>
       <scope>provided</scope>
     </dependency>
     <dependency>