Bump jetty.version from 9.4.38.v20210224 to 9.4.39.v20210325

Bumps `jetty.version` from 9.4.38.v20210224 to 9.4.39.v20210325.

Updates `jetty-server` from 9.4.38.v20210224 to 9.4.39.v20210325
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.4.38.v20210224...jetty-9.4.39.v20210325)

Updates `jetty-webapp` from 9.4.38.v20210224 to 9.4.39.v20210325
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.4.38.v20210224...jetty-9.4.39.v20210325)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 47ad164..ad1db9f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -250,7 +250,7 @@
         <springws.version>3.0.10.RELEASE</springws.version>
         <exam.version>4.13.4</exam.version>
         <slf4j.version>1.7.30</slf4j.version>
-        <jetty.version>9.4.38.v20210224</jetty.version>
+        <jetty.version>9.4.39.v20210325</jetty.version>
         <log4j.version>2.14.1</log4j.version>
         <groovy.version>3.0.7</groovy.version>
         <jaxbri.version>2.3.3</jaxbri.version>