build(deps): bump signature from 3.0.0-rc.1 to 3.0.0-rc.2

Bumps [signature](https://github.com/RustCrypto/traits) from 3.0.0-rc.1 to 3.0.0-rc.2.
- [Commits](RustCrypto/traits@signature-v3.0.0-rc.1...signature-v3.0.0-rc.2)

---
updated-dependencies:
- dependency-name: signature
  dependency-version: 3.0.0-rc.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -21,7 +21,7 @@ rust-version = "1.85"
 cipher = { package = "ssh-cipher", version = "0.3.0-rc.2", features = ["zeroize"] }
 encoding = { package = "ssh-encoding", version = "0.3.0-rc.1", features = ["base64", "digest", "pem", "subtle", "zeroize"] }
 sha2 = { version = "0.11.0-rc.0", default-features = false }
-signature = { version = "3.0.0-rc.1", default-features = false }
+signature = { version = "3.0.0-rc.2", default-features = false }
 subtle = { version = "2", default-features = false }
 zeroize = { version = "1", default-features = false }