Update to ed25519 from rsa

Update command to add ssh key to ssh agent to ed25519 from rsa

Author: Ryan Lail

data/reusables/ssh/add-ssh-key-to-ssh-agent-commandline.md

@@ -1,3 +1,3 @@
 ```shell
-$ ssh-add ~/.ssh/id_rsa
+$ ssh-add ~/.ssh/id_ed25519
 ```