solves #1530 (#1531)

code/components/jomjol_mqtt/server_mqtt.cpp

@@ -155,7 +155,7 @@ void MQTThomeassistantDiscovery() {
         sendHomeAssistantDiscoveryTopic(group,   "rate_per_digitalization_round",  "Change since last digitalization round", "arrow-expand-vertical", valueUnit, "",            "measurement",      ""); // correctly the Unit is Uint/Interval!
         sendHomeAssistantDiscoveryTopic(group,   "timestamp",          "Timestamp",                  "clock-time-eight-outline", "",        "timestamp",   "",                "diagnostic");
         sendHomeAssistantDiscoveryTopic(group,   "json",               "JSON",                       "code-json",                "",        "",            "",                 "diagnostic");
-        sendHomeAssistantDiscoveryTopic(group,   "problem",            "Problem",                    "alert-outline",            "",        "",            "",                 ""); // Special binary sensor which is based on error topic
+        sendHomeAssistantDiscoveryTopic(group,   "problem",            "Problem",                    "alert-outline",            "",        "problem",            "",                 ""); // Special binary sensor which is based on error topic
     }
 }