Firebeetle - Arduino board manager index URL wrong
![userHead](https://dfimg.dfrobot.com/dfPortrait2.png)
In your articlr on setting up the M0 Firebeetle device, here, it specifies one should add this link (http://download.dfrobot.top/firebeetle/package_firebeetle_index.json) into the additional boards manager URL list.
However, the actual link appears to be http://download.dfrobot.top/firebeetle/package_DFRobot_test_index.json
Maybe it's being tested or something but “package_DFRobot_test_index.json” should be renamed to “package_firebeetle_index.json” or the article should be updated.
Reporting it here in case someone else has a problem