Bump jetty.version from 9.4.38.v20210224 to 9.4.39.v20210325 in /core

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-servlet` 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>

Fixes: CVE-2021-28164

Closes #169

Change-Id: I7fe4ef6cfd7bfb50d8f9187aae59d2afb06b399f
diff --git a/core/pom.xml b/core/pom.xml
index 372fa0a..45920c6 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -10,7 +10,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<spring.version>5.3.6</spring.version>
 		<jersey.version>1.19.4</jersey.version>
-		<jetty.version>9.4.38.v20210224</jetty.version>
+		<jetty.version>9.4.39.v20210325</jetty.version>
 		<hibernate.version>5.4.29.Final</hibernate.version>
 		<flyway.version>7.7.3</flyway.version>
 		<log4j.version>2.14.1</log4j.version>