[INLONG-11499][Agent] Add configuration item description

inlong-agent/conf/agent.properties

@@ -98,3 +98,7 @@ agent.prometheus.exporter.port=9080
 ############################
 # whether to enable audit
 audit.enable=true
+# Audit proxy address
+# By default, the audit address is obtained from the manager, and only in special circumstances do
+# special addresses need to be specified through this configuration option
+# audit.proxys=