Update rustls-pemfile requirement from 0.2.1 to 1.0.0

Updates the requirements on [rustls-pemfile](https://github.com/rustls/pemfile) to permit the latest version.
- [Release notes](https://github.com/rustls/pemfile/releases)
- [Commits](rustls/pemfile@v/0.2.1...v/1.0.0)

---
updated-dependencies:
- dependency-name: rustls-pemfile
  dependency-type: direct:production
...

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

Cargo.toml

@@ -23,7 +23,7 @@ webpki-roots = { version = "0.22", optional = true }
 futures-util = { version = "0.3.1", default-features = false }
 hyper = { version = "0.14", features = ["full"] }
 rustls = { version = "0.20.1", default-features = false, features = ["tls12"] }
-rustls-pemfile = "0.2.1"
+rustls-pemfile = "1.0.0"
 tokio = { version = "1.0", features = ["io-std", "macros", "net", "rt-multi-thread"] }
 
 [features]