[JENKINS-60409, JENKINS-60199] - Upgrade Winstone from 5.8 to 5.9 to apply...

[JENKINS-60409, JENKINS-60199] - Upgrade Winstone from 5.8 to 5.9 to apply Jetty 9.4.24+ regression fixes

https://github.com/jenkinsci/winstone/releases/tag/winstone-5.9

war/pom.xml

@@ -100,7 +100,7 @@ THE SOFTWARE.
       -->
       <groupId>org.jenkins-ci</groupId>
       <artifactId>winstone</artifactId>
-      <version>5.8</version>
+      <version>5.9</version>
       <scope>test</scope>
     </dependency>
     <dependency>