Point out that isCMA() is equivalent to conditionalMediation

index.bs

@@ -1591,6 +1591,8 @@ that are returned to the caller when a new credential is created, or a new asser
 
         This method has no arguments and returns a promise to a Boolean value.
 
+        The {{ClientCapability/conditionalMediation}} capability is equivalent to this promise resolving to [TRUE].
+
         Note: If this method is not present, {{CredentialMediationRequirement/conditional}} [=user mediation=] is not available for
         {{CredentialsContainer/get()|navigator.credentials.get()}}.
 
@@ -4012,6 +4014,8 @@ Note: The {{ClientCapability}} enumeration is deliberately not referenced, see [
     ::  The [=WebAuthn Client=] is capable of {{CredentialMediationRequirement/conditional}} mediation
         in {{CredentialsContainer/get()|navigator.credentials.get()}}.
 
+        This capability is equivalent to {{PublicKeyCredential/isConditionalMediationAvailable()}} returning [TRUE].
+
         See [[#sctn-getAssertion]] for more details.
 
     :   <dfn>hybridTransport</dfn>