Update methodname for Rest interceptors getAgentCards() to be GET_EXTENDED_AGENT_CARD_METHOD

Author: kabir

client/transport/rest/src/main/java/io/a2a/client/transport/rest/RestTransport.java

@@ -2,6 +2,7 @@
 
 import static io.a2a.spec.A2AMethods.CANCEL_TASK_METHOD;
 import static io.a2a.spec.A2AMethods.DELETE_TASK_PUSH_NOTIFICATION_CONFIG_METHOD;
+import static io.a2a.spec.A2AMethods.GET_EXTENDED_AGENT_CARD_METHOD;
 import static io.a2a.spec.A2AMethods.GET_TASK_METHOD;
 import static io.a2a.spec.A2AMethods.GET_TASK_PUSH_NOTIFICATION_CONFIG_METHOD;
 import static io.a2a.spec.A2AMethods.LIST_TASK_METHOD;
@@ -426,7 +427,7 @@ public AgentCard getAgentCard(@Nullable ClientCallContext context) throws A2ACli
             if (!needsExtendedCard) {
                 return agentCard;
             }
-            PayloadAndHeaders payloadAndHeaders = applyInterceptors(GET_TASK_METHOD, null, agentCard, context);
+            PayloadAndHeaders payloadAndHeaders = applyInterceptors(GET_EXTENDED_AGENT_CARD_METHOD, null, agentCard, context);
             String url = Utils.buildBaseUrl(agentInterface, "") + "/extendedAgentCard";
             A2AHttpClient.GetBuilder getBuilder = httpClient.createGet().url(url);
             if (payloadAndHeaders.getHeaders() != null) {