docs: do not list client_secret_jwt as supported (#787)

client.go

@@ -63,11 +63,11 @@ type OpenIDConnectClient interface {
 	GetRequestObjectSigningAlgorithm() string
 
 	// Requested Client Authentication method for the Token Endpoint. The options are client_secret_post,
-	// client_secret_basic, client_secret_jwt, private_key_jwt, and none.
+	// client_secret_basic, private_key_jwt, and none.
 	GetTokenEndpointAuthMethod() string
 
 	// JWS [JWS] alg algorithm [JWA] that MUST be used for signing the JWT [JWT] used to authenticate the
-	// Client at the Token Endpoint for the private_key_jwt and client_secret_jwt authentication methods.
+	// Client at the Token Endpoint for the private_key_jwt authentication method.
 	GetTokenEndpointAuthSigningAlgorithm() string
 }