fix README.md #3131

Job	Run time
Test (stable)	9m 6s
Test (nightly)	17m 30s
Check no_std	33s
Check (stable)	1m 0s
Check (nightly)	1m 0s
List directories for parallelizing tests	4s
Check Documentation	46s
Check Style	6s
Test assembly	8m 19s
Test (cp6_782/)	29m 3s
Test (mnt4_753/)	16m 16s
Test (mnt6_753/)	36m 0s
Test (./secp256k1)	1s
Test (./mnt6_298)	1s
Test (./ed_on_cp6_782)	1s
Test (./ed_on_bn254)	46s
Test (./secp384r1)	1s
Test (./ed_on_bls12_377)	46s
Test (./bls12_381)	31s
Test (./grumpkin)	1s
Test (./ed_on_bls12_381)	46s
Test (./curve25519)	46s
Test (./ed_on_mnt4_753)	1s
Test (./ed_on_bls12_381_bandersnatch)	19s
Test (./ed25519)	1s
Test (./bls12_377)	46s
Test (./ed_on_bw6_761)	1s
Test (./ed_on_mnt4_298)	1s
Test (./secp256r1)	1s
Test (./mnt4_298)	1s
Test (./secq256k1)	1s
Test (./pallas)	1s
Test (./bw6_761)	46s
Test (./bw6_767)	46s
Test (./bn254)	48s
Test (./vesta)	1s
	2h 6m 57s

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