Fix passkey documentation

I found the correct way to set it up here in
https://github.com/ory/kratos/blob/68693a43e4e1e3028f17789e72d0b79f6298d139/contrib/quickstart/kratos/all-strategies/kratos.yml#L37

docs/kratos/passwordless/05_passkeys.mdx

@@ -78,7 +78,13 @@ import TabItem from '@theme/TabItem';
     passkey:
       enabled: true
       config:
-        display_name: "My Display Name"`}</CodeBlock>
+        rp:
+          display_name: Your Application name
+          # Set 'id' to the top-level domain.
+          id: localhost
+          # Set 'origin' to the exact URL of the page that prompts the user to use WebAuthn. You must include the scheme, host, and port.
+          origins:
+            - http://localhost:4455`}</CodeBlock>
   </TabItem>
 </Tabs>
 ```