fix: replace real credentials with placeholders in .env.example

Author: mridang

.env.example

@@ -16,11 +16,11 @@ PORT=3000
 # The full domain URL of your ZITADEL instance. You can find this in your
 # ZITADEL organization's settings.
 # Example: https://my-org-a1b2c3.zitadel.cloud
-VITE_ZITADEL_DOMAIN="https://nodules-z0sudo.us1.zitadel.cloud"
+VITE_ZITADEL_DOMAIN="https://your-zitadel-domain"
 
 # The unique Client ID for your application, obtained from the ZITADEL Console.
 # This identifier tells ZITADEL which application is making the request.
-VITE_ZITADEL_CLIENT_ID="324617411510731868"
+VITE_ZITADEL_CLIENT_ID="your-zitadel-application-client-id"
 
 # The full URL where ZITADEL redirects the user after they have authenticated.
 # This MUST exactly match one of the "Redirect URIs" you have configured in