Bump openpojo from 0.8.1 to 0.8.13 (#5468)

Bumps [openpojo](https://github.com/oshoukry/openpojo) from 0.8.1 to 0.8.13.
- [Release notes](https://github.com/oshoukry/openpojo/releases)
- [Changelog](https://github.com/OpenPojo/openpojo/blob/master/doc/release_steps.txt)
- [Commits](OpenPojo/openpojo@openpojo-0.8.1...openpojo-0.8.13)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

jetty-jmx/pom.xml

@@ -53,7 +53,7 @@
     <dependency>
       <groupId>com.openpojo</groupId>
       <artifactId>openpojo</artifactId>
-      <version>0.8.1</version>
+      <version>0.8.13</version>
       <scope>test</scope>
     </dependency>
   </dependencies>