Merge pull request #5034 from jenkinsci/winstone/5.12

[JENKINS-64035] - Winstone 5.12: Update Jetty from 9.4.30.v20200611 to 9.4.33.v20201020

war/pom.xml

@@ -103,7 +103,7 @@ THE SOFTWARE.
       -->
       <groupId>org.jenkins-ci</groupId>
       <artifactId>winstone</artifactId>
-      <version>5.11.1</version>
+      <version>5.12</version>
       <scope>test</scope>
     </dependency>
     <dependency>