fix uva/b typo

src/main.cpp

@@ -175,8 +175,8 @@ void sendValues() {
     char uva[10]; sprintf(uva, "%.2f", uv.readUVA());
     char uvb[10]; sprintf(uvb, "%.2f", uv.readUVB());
     mqtt.publish(topic_uvi.c_str(), uvi, strlen(uvi));
-    mqtt.publish(topic_uvi.c_str(), uva, strlen(uva));
+    mqtt.publish(topic_uva.c_str(), uva, strlen(uva));
-    mqtt.publish(topic_uvi.c_str(), uvb, strlen(uvb));
+    mqtt.publish(topic_uvb.c_str(), uvb, strlen(uvb));
   }
 
   if (sds_active) {