chore: update jetty parameter name to avoid warning message

Author: paodb

pom.xml

@@ -230,7 +230,7 @@
                 <artifactId>jetty-maven-plugin</artifactId>
                 <version>${jetty.version}</version>
                 <configuration>
-                    <scanIntervalSeconds>3</scanIntervalSeconds>
+                    <scan>3</scan>
                     <!-- Use test scope because the UI/demo classes are in
                             the test package. -->
                     <useTestScope>true</useTestScope>