Update website/docs/cli/cloud/migrating.mdx

Co-authored-by: Matthew Garrell <69917312+mgarrell777@users.noreply.github.com>

website/docs/cli/cloud/migrating.mdx

@@ -82,4 +82,4 @@ terraform {
    }
  }
 ```
-~> **Warning:** Because the `cloud` block does not support the `prefix` argument, once you migrate you will need to refer to workspaces by their full name when using the Terraform CLI. For example, rather than `terraform workspace select prod`, you would need to run the command `terraform workspace select my-app-prod`.
+~> **Warning:** Because the `cloud` block does not support the `prefix` argument, once you migrate, you must refer to workspaces by their full name when using the Terraform CLI. For example, rather than `terraform workspace select prod`, you must run the command `terraform workspace select my-app-prod`.