Documentation typo for Asset Tracking schema API

The documentation for getting a device’s configuration schema (“Get device schema”) erroneously specifies the HTTP header as “Accepts” when it should be “Accept” in order to work correctly - Cloud API | Reference Documentation | Particle

I wasn’t sure find where this was specified in the docs repo, so couldn’t send a pull request directly.

I’ve added an internal issue to fix this. It’s not in the docs repo because it’s generated automatically from the internal cloud API source comments.