Bump org.eclipse.jetty:jetty-webapp in /jDPWR

Bumps [org.eclipse.jetty:jetty-webapp](https://github.com/eclipse/jetty.project) from 9.3.9.v20160517 to 9.4.33.v20201020.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.3.9.v20160517...jetty-9.4.33.v20201020)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-webapp
  dependency-type: direct:production
...

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

jDPWR/pom.xml

@@ -7,7 +7,7 @@
   <packaging>jar</packaging>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <jetty-version>9.3.9.v20160517</jetty-version>
+    <jetty-version>9.4.33.v20201020</jetty-version>
   </properties>
   <dependencies>
     <dependency>