chore: fix broken URLs in documentation #3132

Job	Run time
Check no_std	39s
Check (stable)	1m 2s
List directories for parallelizing tests	3s
Check (nightly)	1m 0s
Check Documentation	1m 1s
Check Style	8s
Test (stable)	9m 19s
Test (nightly)	17m 32s
Test assembly	8m 22s
Test (cp6_782/)	16s
Test (mnt4_753/)	20m 10s
Test (mnt6_753/)	32m 47s
Test (./secp256k1)	1s
Test (./mnt6_298)	1s
Test (./ed_on_cp6_782)	1s
Test (./ed_on_bn254)	41s
Test (./secp384r1)	1s
Test (./ed_on_bls12_377)	43s
Test (./bls12_381)	42s
Test (./grumpkin)	1s
Test (./ed_on_bls12_381)	47s
Test (./curve25519)	51s
Test (./ed_on_mnt4_753)	1s
Test (./ed_on_bls12_381_bandersnatch)	38s
Test (./ed25519)	1s
Test (./bls12_377)	43s
Test (./ed_on_bw6_761)	18s
Test (./ed_on_mnt4_298)	1s
Test (./secp256r1)	1s
Test (./mnt4_298)	1s
Test (./secq256k1)	1s
Test (./pallas)	1s
Test (./bw6_761)	34s
Test (./bw6_767)	35s
Test (./bn254)	46s
Test (./vesta)	1s
	1h 39m 50s

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