bugfix/ch67767/tinker-for-bsom

[busticated]

Description

running the particle flash --usb tinker command when targeting a bsom fails with: Error writing firmware: file does not exist and no known app found. (ch)

How to Test

using a bsom device, run particle flash --usb tinker and verify that your device is flashed appropriately

Completeness

• [x] User is totes amazing for contributing!
• [x] Contributor has signed CLA
• [x] Problem and solution clearly stated
• [x] Tests have been provided
• [x] Docs have been updated
• [x] CI is passing