fix(deps): update dependency org.eclipse.jetty:jetty-server to v11.0.20

Author: renovate[bot]

pom.xml

@@ -11,7 +11,7 @@
 
     <properties>
         <spigot-api.version>1.20.4-R0.1-SNAPSHOT</spigot-api.version>
-        <jetty.version>11.0.19</jetty.version>
+        <jetty.version>11.0.20</jetty.version>
         <prometheus-client.version>0.16.0</prometheus-client.version>
         <json-path.version>2.9.0</json-path.version>
         <junit.jupiter.version>5.10.1</junit.jupiter.version>