Bump jetty.version from 11.0.19 to 11.0.20

Bumps `jetty.version` from 11.0.19 to 11.0.20.

Updates `org.eclipse.jetty:jetty-client` from 11.0.19 to 11.0.20

Updates `org.eclipse.jetty:jetty-servlet` from 11.0.19 to 11.0.20

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.eclipse.jetty:jetty-servlet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -262,7 +262,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>11</java.version>
-    <jetty.version>11.0.19</jetty.version>
+    <jetty.version>11.0.20</jetty.version>
   </properties>
 
   <dependencies>