Update staging environment setup instructions (#3056)

Co-authored-by: Michael Novotny <[email protected]>

Author: anagstef

docs/guides/development/managing-environments.mdx

@@ -38,9 +38,10 @@ When deploying to production, you must first activate your `Production` environm
 
 Staging environments enable you to internally test and demo changes to your application or website before deploying them to production. Currently, Clerk only offers **Development** and **Production** instances. Official support for **Staging** instances is still on the [roadmap](https://feedback.clerk.com/roadmap/de417dd1-fa2e-4997-868f-4c9248027e7d). However, you can set up a "staging environment" by creating a separate Clerk application with a separate domain.
 
-Creating a separate Clerk application will prevent you from using live production environment data in your staging environment. If you are on a Pro, Enterprise, or Startup plan, **Clerk will fully upgrade your staging application for free.**
+Creating a separate Clerk application will prevent you from using live production environment data in your staging environment.
 
-It is important to note that when you use a separate Clerk application for your staging environment, changes to this application will not be automatically mirrored in your main application for your production environment. You must manually make these changes yourself if you want them to be reflected in both applications.
+> [!IMPORTANT]
+> When you use a separate Clerk application for your staging environment, changes to this application **will not be automatically mirrored** in your main application for your production environment. You must manually make these changes yourself if you want them to be reflected in both applications.
 
 ### Set up a staging Clerk application
 
@@ -49,7 +50,6 @@ The following steps will help you set up a new Clerk application with a staging-
 1. **Set up a subdomain** - This will be your staging domain. For example, if your domain is `my-site.com`, you could use `staging.my-site.com`.
 1. **Create a new Clerk app** - Your staging environment will connect to this app instead of your main one. See [the Clerk quickstart guide](/docs/getting-started/quickstart/setup-clerk) to learn how to create a Clerk app.
 1. **Deploy and configure your staging app's production instance** - Using production API keys will make your staging app more secure. Follow the [Deploy to production](/docs/guides/development/deployment/production) guide to do so.
-1. **Contact Clerk support to upgrade your staging app for free** - If you are on a Pro, Enterprise, or Startup plan, Clerk will fully upgrade your staging app for free.
 
 ### Alternatives