Update rustls-pemfile to 2.2.0. (NLnetLabs#49)

Author: partim

Cargo.toml

@@ -28,7 +28,7 @@ maybe-async = "0.2.6"
 openssl = { version = "0.10.35", optional = true }
 r2d2 = { version = "0.8.10", optional = true }
 rustls = { version = "0.23.31", default-features = false, features = ["std", "logging", "tls12", "ring"], optional = true }
-rustls-pemfile = {version = "0.2.1", optional = true }
+rustls-pemfile = {version = "2.2.0", optional = true }
 serde = "1.0.126"
 serde_derive = "1.0.126"
 serde_bytes = "0.11.5"