[CALCITE-6659] Update Jetty from 9.4.44.v20210927 to 9.4.56.v20240826 in Avatica

Author: stoty

gradle.properties

@@ -70,7 +70,7 @@ httpcore5.version=5.2.3
 jackson.version=2.15.2
 jcip-annotations.version=1.0-1
 jcommander.version=1.72
-jetty.version=9.4.44.v20210927
+jetty.version=9.4.56.v20240826
 junit.version=4.12
 kerby.version=1.1.1
 log4j2.version=2.17.1