fix reference

neps/nep-0488.md

@@ -1207,7 +1207,7 @@ The previous NEP for supporting BLS signature based on BLS12-381[^26]
 [^46]: Bench vectors from EIP2537: [https://eips.ethereum.org/assets/eip-2537/bench_vectors](https://eips.ethereum.org/assets/eip-2537/bench_vectors)
 [^47]: Metter Labs tests for EIP2537: [https://github.com/matter-labs/eip1962/tree/master/src/test/test_vectors/eip2537](https://github.com/matter-labs/eip1962/tree/master/src/test/test_vectors/eip2537)
 [^48]: Tests from Go Ethereum implementation: [https://github.com/ethereum/go-ethereum/tree/master/core/vm/testdata/precompiles](https://github.com/ethereum/go-ethereum/tree/master/core/vm/testdata/precompiles)
-[^51]: draft-irtf-cfrg-pairing-friendly-curves-11 [https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-11#name-bls-curves-for-the-128-bit-](https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-11#name-bls-curves-for-the-128-bit-)  *(*[https://github.com/ethereum/consensus-specs/blob/dev/specs/altair/bls.md](https://github.com/ethereum/consensus-specs/blob/dev/specs/altair/bls.md) → [https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-bls-signature-04](https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-bls-signature-04) → this ref*)*
+[^51]: draft-irtf-cfrg-pairing-friendly-curves-11 [https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-11#name-bls-curves-for-the-128-bit-](https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-11#name-bls-curves-for-the-128-bit-)
 [^52]: Paper with BLS12-381: [https://eprint.iacr.org/2019/403.pdf](https://eprint.iacr.org/2019/403.pdf)
 [^53]: Zkcrypto points encoding: [https://github.com/zkcrypto/pairing/blob/0.14.0/src/bls12_381/README.md](https://github.com/zkcrypto/pairing/blob/0.14.0/src/bls12_381/README.md)
 [^54]: Draft PR for BLS12-381 operations in nearcore: https://github.com/near/nearcore/pull/9317