Bump libc from 0.2.69 to 0.2.70 (#10006)

* Bump libc from 0.2.69 to 0.2.70

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.69 to 0.2.70.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.69...0.2.70)

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

* [auto-commit] Update all Cargo lock files

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: dependabot-buildkite <dependabot-buildkite@noreply.solana.com>

validator/Cargo.toml

@@ -32,7 +32,7 @@ solana-vote-program = { path = "../programs/vote", version = "1.2.0" }
 solana-vote-signer = { path = "../vote-signer", version = "1.2.0" }
 
 [target."cfg(unix)".dependencies]
-libc = "0.2.66"
+libc = "0.2.70"
 signal-hook = "0.1.15"
 
 [package.metadata.docs.rs]