Util: Update default user-agent

as recommended by drzed

core/java/src/net/i2p/util/DNSOverHTTPS.java

@@ -69,7 +69,7 @@ public class DNSOverHTTPS implements EepGet.StatusListener {
      *
      *  @since public since 0.9.54 for i2ptunnel
      */
-    public static final String UA_CLEARNET = "Mozilla/5.0 (Windows NT 10.0; rv:102.0) Gecko/20100101 Firefox/102.0";
+    public static final String UA_CLEARNET = "Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101 Firefox/115.0";
 
     private static final int MAX_RESPONSE_SIZE = 2048;
     private static final boolean DEBUG = false;