[5.11] Update Docs for Passkey Re-Enrollment During Authentication

[KaveeshaPiumini]

Purpose

Update docs for IS 5.11 to mention that this is available from update level 5.11.0.420.full.

Add the following configuration under [fido] in <IS_HOME>/repository/conf/deployment.toml:

[fido]
allow_multiple_passkey_progressive_enrollment = true

With the new configuration enabled, users can register multiple passkeys under the same account during the fido key progessive enrolment.

If the configuration is not set, the IS will retain the previous behavior, allowing only a single passkey enrollment.

Related Issue

• Passkey Re-Enrollment During Authentication product-is#25796