Bump jetty-server from 9.4.18.v20190429 to 9.4.38.v20210224

Bumps [jetty-server](https://github.com/eclipse/jetty.project) from 9.4.18.v20190429 to 9.4.38.v20210224.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.18.v20190429...jetty-9.4.38.v20210224)

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

pom.xml

@@ -26,7 +26,7 @@
         <typesafe-config.version>1.3.1</typesafe-config.version>
         <testng.version>6.14.3</testng.version>
         <httpclient.version>4.5.6</httpclient.version>
-        <jettyserver.version>9.4.18.v20190429</jettyserver.version>
+        <jettyserver.version>9.4.38.v20210224</jettyserver.version>
 
         <mvn.plugins.compiler.version>2.5.1</mvn.plugins.compiler.version>
         <mvn.plugins.javadoc.version>2.10.1</mvn.plugins.javadoc.version>