Update SSH_with_PIV_and_PKCS11.adoc

refer to generic SSH page for YubiKeys

content/PIV/Guides/SSH_with_PIV_and_PKCS11.adoc

@@ -1,6 +1,11 @@
 == Using PIV for SSH through PKCS #11
 This is a step-by-step guide on setting up a YubiKey with PIV to work for public-key authentication with OpenSSH through PKCS #11. These instructions apply primarily to macOS and Linux systems.
 
+[NOTE]
+There are multiple ways to use YubiKeys for SSH. See
+link:../../SSH/[SSH]
+for options.
+
 === Prerequisites
 * a YubiKey with the PIV application loaded
 * the yubico-piv-tool software (download from link:../yubico-piv-tool/Releases/)