Merge pull request #106 from coreos/release-0.6.4

cargo: openssh-keys release 0.6.4

Author: HuijingHei

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "openssh-keys"
-version = "0.6.3"
+version = "0.6.4"
 edition = "2021"
 rust-version = "1.75.0"
 authors = ["Stephen Demos <stephen@demos.zone>"]