[fix] Adding API_LEVEL_21 font support

src/bolos/fonts_info.c

@@ -231,6 +231,7 @@ void parse_fonts(void *code, unsigned long text_load_addr,
   case SDK_API_LEVEL_18:
   case SDK_API_LEVEL_19:
   case SDK_API_LEVEL_20:
+  case SDK_API_LEVEL_21:
     break;
   default:
     // Unsupported API_LEVEL, will not parse fonts!