docs: fix discord badge #3127

Job	Run time
Check Documentation	54s
List directories for parallelizing tests	2s
Check no_std	25s
Check (stable)	1m 10s
Check Style	5s
Check (nightly)	1m 6s
Test (stable)	9m 0s
Test assembly	8m 17s
Test (cp6_782/)	28m 55s
Test (nightly)	17m 31s
Test (mnt4_753/)	13m 45s
Test (mnt6_753/)	24m 46s
Test (./pallas)	1m 6s
Test (./ed25519)	1m 10s
Test (./ed_on_mnt4_753)	4m 3s
Test (./bn254)	2m 20s
Test (./bls12_381)	3m 22s
Test (./secp384r1)	1m 21s
Test (./bw6_767)	4m 12s
Test (./grumpkin)	1m 6s
Test (./curve25519)	1m 5s
Test (./ed_on_bls12_377)	1m 11s
Test (./ed_on_mnt4_298)	1m 8s
Test (./vesta)	1m 7s
Test (./ed_on_bls12_381_bandersnatch)	1m 1s
Test (./bls12_377)	4m 11s
Test (./ed_on_bw6_761)	40s
Test (./mnt4_298)	3m 52s
Test (./secp256k1)	1m 6s
Test (./ed_on_bn254)	1m 11s
Test (./ed_on_bls12_381)	1m 22s
Test (./secp256r1)	57s
Test (./bw6_761)	3m 46s
Test (./secq256k1)	56s
Test (./mnt6_298)	5m 21s
Test (./ed_on_cp6_782)	1m 17s
	2h 34m 47s

Provide feedback