security/ruby-sshkey: update to 3.0.0

3.0.0 (2023-08-25)

What's Changed

* Breaking: Drop support for Ruby < 2.5.
* Added: Support for ECDSA (@bensie, @rchekaluk) #43, #44, #46, #49
* Added: OpenSSL 3.x support by @rchekaluk in #48
* Added: Test against Ruby 2.5, 2.6, 2.7, 3.0, 3.1, 3.2, 3.3, jruby-9.3,
  jruby-9.4 with GitHub Actions
* Fixed: SSH public keys not validated/parsed if contain comments by
  @MangyCoyote in #39

New Contributors

* @djberg96 made their first contribution in #40
* @MangyCoyote made their first contribution in #39
* @gogainda made their first contribution in #42
* @rchekaluk made their first contribution in #43

(taca)