Update rustls-pemfile requirement from =2.0.0-alpha.2 to =2.0.0

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](https://github.com/rustls/pemfile/commits)

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

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

Cargo.toml

@@ -25,7 +25,7 @@ futures-util = { version = "0.3", default-features = false }
 [dev-dependencies]
 hyper = { version = "0.14", features = ["full"] }
 rustls = { version = "=0.22.0-alpha.5", default-features = false, features = ["tls12"] }
-rustls-pemfile = "=2.0.0-alpha.2"
+rustls-pemfile = "=2.0.0"
 tokio = { version = "1.0", features = ["io-std", "macros", "net", "rt-multi-thread"] }
 
 [features]