Update README for 1.6 #25

Job	Run time
build_test (3.12, orb)	8m 43s
build_test (3.14, nequip)	2m 9s
build_test (3.14, fennix)	3m 31s
build_test (3.14, mace-aimnet-torchmd)	9m 47s
	24m 10s

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