Update index.bs

agreed

Co-authored-by: Emil Lundberg <emil@emlun.se>

index.bs

@@ -5888,8 +5888,10 @@ The attestation certificate MUST have the following fields/extensions:
 
 - If the related attestation root certificate is used for multiple authenticator models, the Extension OID
     `1.3.6.1.4.1.45724.1.1.4` (`id-fido-gen-ce-aaguid`) MUST be present, containing the AAGUID as a 16-byte OCTET STRING.
-    The extension MUST NOT be marked as critical. As [=Relying Parties=] may not know if the attestation root
-    certificate is used for multiple authenticator models, it is suggested that [=Relying Parties=] check if the extension
+    The extension MUST NOT be marked as critical.
+
+    As [=[RPS]=] may not know if the attestation root
+    certificate is used for multiple authenticator models, it is suggested that [=[RPS]=] check if the extension
     is present, and if it is, then validate that it contains that same AAGUID as presented in the [=attestation object=].
 
     Note that an X.509 Extension encodes the DER-encoding of the value in an OCTET STRING.