Update draft-ietf-oauth-attestation-based-client-auth.md

Co-authored-by: Paul Bastian <[email protected]>

Author: tplooker

draft-ietf-oauth-attestation-based-client-auth.md

@@ -543,7 +543,7 @@ Authorization servers using Attestation-Based Client Authentication are RECOMMEN
 - The authorization_code as specified in section 4.1 {{RFC6749}}.
 - The auth_req_id as specified in section 7.3 {{CIBA}}.
 
-How this binding is established and then proven is specific to the protocol artefact. For example establishing binding to an authorization_code involves the client instance using client attestation in the authorization request, and proving binding of the authorization_code to the Client Instance involves using the client attestation mechanism to authenticate at the token endpoint using an authorization code grant.
+How this binding is established and then proven is specific to the protocol artifact. For example establishing binding to an authorization_code involves the client instance using client attestation in the authorization request, and proving binding of the authorization_code to the Client Instance involves using the client attestation mechanism to authenticate at the token endpoint using an authorization code grant.
 
 ## Web Server Default Maximum HTTP Header Sizes