Add parameters for r²SCAN hybrids

[awvwgk]

also update r4/r2 expectation values (see awvwgk/simple-dftd3@5642677).

[codecov]

Codecov Report

Merging #141 (1a1799a) into main (982bb90) will decrease coverage by 0.06%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #141      +/-   ##
==========================================
- Coverage   59.08%   59.02%   -0.07%     
==========================================
  Files          42       42              
  Lines        2977     3014      +37     
  Branches     1016     1019       +3     
==========================================
+ Hits         1759     1779      +20     
- Misses        640      654      +14     
- Partials      578      581       +3     

Impacted Files	Coverage Δ
src/dftd4/data/r4r2.f90	37.50% <ø> (ø)
test/unit/test_param.f90	50.00% <ø> (ø)
src/dftd4/param.f90	38.22% <50.00%> (+0.24%)	⬆️
python/dftd4/parameters.py	72.72% <0.00%> (-5.66%)	⬇️
python/dftd4/interface.py	96.87% <0.00%> (-0.04%)	⬇️
python/dftd4/ase.py	76.00% <0.00%> (ø)
python/dftd4/qcschema.py	96.49% <0.00%> (ø)
python/dftd4/test_qcschema.py	93.05% <0.00%> (ø)
python/dftd4/test_interface.py	100.00% <0.00%> (ø)
python/dftd4/test_parameters.py	100.00% <0.00%> (ø)
... and 4 more

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