Update github.com/duo-labs/webauthn commit hash to 81aea48

This MR contains the following updates:

Package	Type	Update	Change
github.com/duo-labs/webauthn	require	digest	a22482e -> 81aea48

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vendor/github.com/duo-labs/webauthn/metadata/metadata.go

@@ -11,8 +11,8 @@ import (
 	"net/http"
 
 	"github.com/cloudflare/cfssl/revoke"
+	"github.com/google/uuid"
 	"github.com/mitchellh/mapstructure"
-	uuid "github.com/satori/go.uuid"
 
 	jwt "github.com/golang-jwt/jwt/v4"
 )