Tweak changelog style

index.bs

@@ -9883,21 +9883,22 @@ This section contains the substantive changes that have been made to this specif
 
 ## Changes since Web Authentication Level 2 [[webauthn-2-20210408]] ## {#changes-since-l2}
 
-- Two authenticatorData flags assigned: 
+- [=Authenticator data=] flags [=authData/flags/BE=] and [=authData/flags/BS=] assigned:
+    - [[#sctn-authenticator-data]]
     - [[#sctn-credential-backup]]
     - [[#sctn-automation-set-credential-properties]]
 - [[#sctn-getClientCapabilities]]
 - Conditional mediation for get: [[#sctn-getAssertion]]
 - Conditional mediation for create: [[#sctn-createCredential]]
-- Added topOrigin: [[#dictionary-client-data]]
+- New [=client data=] attribute {{CollectedClientData/topOrigin}}: [[#dictionary-client-data]]
 - Create operations in cross-origin iframes:
     - [[#sctn-createCredential]]
     - [[#sctn-iframe-guidance]]
-- Extension: [[#prf-extension]]
+- [[#prf-extension]]
 - [[#sctn-compound-attestation]]
 - Updated timeout guidance: [[#sctn-timeout-recommended-range]]
 - New JSON (de)serialization methods: 
-    - <a href="#dom-publickeycredential-tojson">toJSON() method (in 5.1. PublicKeyCredential Interface)</a>
+    - {{PublicKeyCredential/toJSON()}} method in [[#iface-pkcredential]]
     - [[#sctn-parseCreationOptionsFromJSON]]
     - [[#sctn-parseRequestOptionsFromJSON]]
 - [[#sctn-related-origins]]