update readme (#58)

Co-authored-by: Jye <JyeSmith@users.noreply.github.com>

Since very fisrt line of code is time to publish the very first OpenV…

…Tx release.

** Supported Protocols **

- SmartAudio
- Tramp

** Supported Hardware **

- EWRF E7082VM
- Happymodel Pancake

Please use [configurator](https://openvtx.org/) to upgrade if you have bootloader on place, otherwise follow the
[installation guide](https://github.com/OpenVTx/OpenVTx_bootloader#flashing-the-vtx).

Huge thanks to all the contributors!