update secp256r1 malleability test

crates/aptos-crypto/src/unit_tests/secp256r1_ecdsa_test.rs

@@ -208,13 +208,11 @@ proptest! {
  let sig_unchecked = Signature::from_bytes_unchecked(&serialized);
  prop_assert!(sig_unchecked.is_ok());
 
- // Update the signature by setting S = L to make it invalid.
+ // S = ORDER_HALF should be a canonical signature.
  serialized[32..].copy_from_slice(&ORDER_HALF);
- let serialized_malleable_l: &[u8] = &serialized;
- // try_from will fail with CanonicalRepresentationError.
- prop_assert_eq!(
- Signature::try_from(serialized_malleable_l),
- Err(CryptoMaterialError::CanonicalRepresentationError)
+ let canonical: &[u8] = &serialized;
+ prop_assert!(
+ Signature::try_from(canonical).is_ok()
  );
  }
 }