build(deps): bump crypto-bigint from 0.6.0 to 0.6.1

Bumps [crypto-bigint](https://github.com/RustCrypto/crypto-bigint) from 0.6.0 to 0.6.1.
- [Changelog](https://github.com/RustCrypto/crypto-bigint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/RustCrypto/crypto-bigint/commits/v0.6.1)

---
updated-dependencies:
- dependency-name: crypto-bigint
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -22,7 +22,7 @@ pkcs8 = { version = "0.11.0-rc.1", default-features = false, features = ["alloc"
 signature = { version = "=2.3.0-pre.4", default-features = false, features = ["alloc", "digest", "rand_core"] }
 spki = { version = "0.8.0-rc.1", default-features = false, features = ["alloc"] }
 zeroize = { version = "1.5", features = ["alloc"] }
-crypto-bigint = { version = "0.6.0", default-features = false, features = ["zeroize", "alloc"] }
+crypto-bigint = { version = "0.6.1", default-features = false, features = ["zeroize", "alloc"] }
 crypto-primes = { version = "0.6.0", default-features = false }
 
 # optional dependencies