Update pem requirement from 1.1.0 to 3.0.1

Updates the requirements on [pem](https://github.com/jcreekmore/pem-rs) to permit the latest version.
- [Changelog](https://github.com/jcreekmore/pem-rs/blob/master/CHANGELOG.md)
- [Commits](jcreekmore/pem-rs@v1.1.0...v3.0.1)

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

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

kube-client/Cargo.toml

@@ -48,7 +48,7 @@ http-body = { version = "0.4.2", optional = true }
 either = { version = "1.6.1", optional = true }
 thiserror = "1.0.29"
 futures = { version = "0.3.17", optional = true }
-pem = { version = "1.1.0", optional = true }
+pem = { version = "3.0.1", optional = true }
 openssl = { version = "0.10.36", optional = true }
 rustls = { version = "0.21.0", features = ["dangerous_configuration"], optional = true }
 rustls-pemfile = { version = "1.0.0", optional = true }