renamed authenticator-model to sctn-authenticator-model in order to a…

…void bikeshed warning regarding multiple elements with same ID

index.bs

@@ -255,7 +255,7 @@ A conforming User Agent MUST also be a conforming implementation of the IDL frag
 
 ## Authenticators ## {#conforming-authenticators}
 
-An [=authenticator=] MUST provide the operations defined by [[#authenticator-model]], and those operations MUST behave as
+An [=authenticator=] MUST provide the operations defined by [[#sctn-authenticator-model]], and those operations MUST behave as
 described there. This is a set of functional and security requirements for an authenticator to be usable by a [=Conforming User
 Agent=].
 
@@ -2056,7 +2056,7 @@ The value {{UserVerificationRequirement/discouraged}} indicates that the [=[RP]=
 during the operation (e.g., in the interest of minimizing disruption to the user interaction flow).
 
 
-# WebAuthn <dfn>Authenticator Model</dfn> # {#authenticator-model}
+# WebAuthn <dfn>Authenticator Model</dfn> # {#sctn-authenticator-model}
 
 [[#api|The Web Authentication API]] implies a specific abstract functional model for an [=authenticator=]. This section
 describes that [=authenticator model=].