Bump libc from 0.2.66 to 0.2.67 (#8680)

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.66 to 0.2.67.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.66...0.2.67)

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

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

core/Cargo.toml

@@ -30,7 +30,7 @@ jsonrpc-derive = "14.0.5"
 jsonrpc-http-server = "14.0.6"
 jsonrpc-pubsub = "14.0.6"
 jsonrpc-ws-server = "14.0.6"
-libc = "0.2.66"
+libc = "0.2.67"
 log = "0.4.8"
 nix = "0.17.0"
 num-traits = "0.2"