Update Readme.md
Adding to readme
@@ -161,6 +161,7 @@ There's a set of example specs, divided between the [safe](examples/) and [unsaf
- [P256](examples/p256/src/p256.rs)
- [ECDSA-P256-SHA256](examples/ecdsa-p256-sha256/src/ecdsa.rs)
- [Ed25519](examples/ed25519/src/ed25519.rs)
+- [BIP-340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki), including secp.
## Unsafe examples
