Use max version number for YAML (provisional)

TODO: this needs to be changed once there is a proper version number assigned.

radio/src/storage/sdcard_yaml.cpp

@@ -169,7 +169,8 @@ const char * readModel(const char * filename, uint8_t * buffer, uint32_t size, u
         }
     }
     //#endif
-    
+
+    *version = 255; // max version number
     return readYamlFile(path, YamlTreeWalker::get_parser_calls(), &tree);
 }