HBASE-23998. Update license for jetty-client.

Author: jojochuang

hbase-resource-bundle/src/main/resources/supplemental-models.xml

@@ -628,6 +628,20 @@ under the License.
       </licenses>
     </project>
   </supplement>
+  <supplement>
+    <project>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-client</artifactId>
+
+      <licenses>
+        <license>
+          <name>Apache License, Version 2.0</name>
+          <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+          <distribution>repo</distribution>
+        </license>
+      </licenses>
+    </project>
+  </supplement>
   <supplement>
     <project>
       <groupId>org.eclipse.jetty.websocket</groupId>