KNOX-2454 - Upgrade jetty to 9.4.31.v20200723

Signed-off-by: Kevin Risden <krisden@apache.org>
diff --git a/pom.xml b/pom.xml
index 7393712..aeaa5a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -221,7 +221,7 @@
         <jee-pac4j.version>5.0.0</jee-pac4j.version>
         <jericho-html.version>3.4</jericho-html.version>
         <jersey.version>2.6</jersey.version>
-        <jetty.version>9.4.30.v20200611</jetty.version>
+        <jetty.version>9.4.31.v20200723</jetty.version>
         <jline.version>2.14.6</jline.version>
         <jna.version>5.6.0</jna.version>
         <joda-time.version>2.10.6</joda-time.version>