chore(deps): Update elliptic-curve requirement from 0.12.2 to 0.13.5

Updates the requirements on [elliptic-curve](https://github.com/RustCrypto/traits) to permit the latest version.
- [Commits](RustCrypto/traits@elliptic-curve-v0.12.2...elliptic-curve/v0.13.5)

---
updated-dependencies:
- dependency-name: elliptic-curve
  dependency-type: direct:production
...

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

Cargo.toml

@@ -78,7 +78,7 @@ digest = { version = "0.10.3", default-features = false }
 ecdsa = { version = "0.15", features = ["pkcs8", "digest", "der"] }
 ed25519 = { version = "2.2.1", features = ["alloc"] }
 ed25519-dalek = { version = "2.0.0-rc.2", features = ["pkcs8", "rand_core"] }
-elliptic-curve = { version = "0.12.2", features = ["arithmetic", "pem"] }
+elliptic-curve = { version = "0.13.5", features = ["arithmetic", "pem"] }
 lazy_static = "1.4.0"
 oci-distribution = { version = "0.9", default-features = false, optional = true }
 olpc-cjson = "0.1"