R2SCAN0 defined twice

[timmyte]

The simple keyword for r2-SCAN0 is defined twice:

opi/src/opi/input/simple_keywords/dft.py

Lines 277 to 280 in fb149b9

	"""SimpleKeyword: DFT functional."""
	R2SCAN0 = SimpleKeyword("r2scan0")
	"""SimpleKeyword: DFT functional."""
	R2SCAN0 = SimpleKeyword("r2scan0")