build(deps): Update p256 requirement from 0.9.0 to 0.10.0 (#2384)

Updates the requirements on [p256](https://github.com/RustCrypto/elliptic-curves) to permit the latest version.
- [Release notes](https://github.com/RustCrypto/elliptic-curves/releases)
- [Commits](https://github.com/RustCrypto/elliptic-curves/commits/p256/v0.10.0)

---
updated-dependencies:
- dependency-name: p256
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

core/Cargo.toml

@@ -25,7 +25,7 @@ log = "0.4"
 multiaddr = { version = "0.13.0" }
 multihash = { version = "0.14", default-features = false, features = ["std", "multihash-impl", "identity", "sha2"] }
 multistream-select = { version = "0.11", path = "../misc/multistream-select" }
-p256 = { version = "0.9.0", default-features = false, features = ["ecdsa"], optional = true }
+p256 = { version = "0.10.0", default-features = false, features = ["ecdsa"], optional = true }
 parking_lot = "0.11.0"
 pin-project = "1.0.0"
 prost = "0.9"