use const char * instead of arduino String

src/console.cpp

@@ -393,7 +393,7 @@ void EMSESPShell::add_console_commands() {
             if (return_code == CommandRet::OK && json.size()) {
                 if (json.containsKey("api_data")) {
                     JsonVariant data = json["api_data"];
-                    shell.println(data.as<String>());
+                    shell.println(data.as<const char *>());
                     return;
                 }
                 serializeJsonPretty(doc, shell);