Update README for C3: camera -> cameras (#22415)
Update README for C3: camera -> cameras (#22415)

* Update README for C3

* Update README.md

Co-authored-by: Adeeb Shihadeh <560a1160cdca1405d17f7eea1cfe3906403d06ef@gmail.com>
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot