Update rustls-native-certs requirement from 0.3 to 0.4 (fortanix#111)

Updates the requirements on [rustls-native-certs](https://github.com/ctz/rustls-native-certs) to permit the latest version.
- [Release notes](https://github.com/ctz/rustls-native-certs/releases)
- [Commits](rustls/rustls-native-certs@v/0.3.0...v/0.4.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

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

Cargo.toml

@@ -34,7 +34,7 @@ socks = { version = "0.3.2", optional = true }
 rustls = { version = "0.17", optional = true, features = [] }
 webpki = { version = "0.21", optional = true }
 webpki-roots = { version = "0.20", optional = true }
-rustls-native-certs = { version = "0.3", optional = true }
+rustls-native-certs = { version = "0.4", optional = true }
 serde = { version = "1", optional = true }
 serde_json = { version = "1", optional = true }
 encoding = { version = "0.2", optional = true }