Fix incorrect summary of how an SSH agent works (github#36304)

Author: ja2048

content/authentication/connecting-to-github-with-ssh/working-with-ssh-key-passphrases.md

@@ -18,7 +18,7 @@ shortTitle: SSH key passphrases
 
 ## About passphrases for SSH keys
 
-With SSH keys, if someone gains access to your computer, the attacker can gain access to every system that uses that key. To add an extra layer of security, you can add a passphrase to your SSH key. To avoid entering the passphrase every time you connect, you can securely save your passphrase in the SSH agent.
+With SSH keys, if someone gains access to your computer, the attacker can gain access to every system that uses that key. To add an extra layer of security, you can add a passphrase to your SSH key. To avoid entering the passphrase every time you connect, you can securely cache the key in the SSH agent.
 
 ## Adding or changing a passphrase