fix: refs #8715 update echo statement in Jenkinsfile to remove comment from diffOutput

Jenkinsfile

@@ -85,7 +85,7 @@ pipeline {
                         script: "git fetch origin ${TARGET_BRANCH} && git diff --name-only origin/${TARGET_BRANCH}",
                         returnStdout: true
                     ).trim().split('\n')
-                    echo "DIFF: ${diffOutput}" // diffOutput
+                    echo "DIFF: ${diffOutput}"
                     def hasChangelog = diffOutput.any { it == 'CHANGELOG.md' }
 
                     if (!hasChangelog) {