Update the display name, description, class name, README and example
workflow file names per Nvidia's naming. The node ID RTXTrueHDR is
unchanged so existing workflows keep working. Bump version to 0.2.1.
Amp-Thread-ID: https://ampcode.com/threads/T-01a1325a-88ff-740d-a7ca-1cf3bf8f601f
Co-authored-by: Amp <amp@ampcode.com>
