Add `b97-3c`

[PythonFZ]

This PR adds paramaters for https://pubs.aip.org/aip/jcp/article/148/6/064104/196461/B97-3c-A-revised-low-cost-variant-of-the-B97-D.

Also see CP2K implementation:

https://github.com/cp2k/cp2k/blob/7123f6cb9512cd8f56af81252de383ca40d906e7/src/qs_dispersion_pairpot.F#L877-L881