chore: update TROUBLESHOOTING.md instructions to use projects step Terraform service account when requesting quota increase (#1062)

Co-authored-by: Daniel Andrade <[email protected]>

Author: renato-rudnicki

docs/TROUBLESHOOTING.md

@@ -47,7 +47,7 @@ form to request a quota increase.
 
 In the support form,
 for the field **Email addresses that will be used to create projects**,
-use the email address of `terraform_service_account` that is created by the Terraform Example Foundation 0-bootstrap step.
+use the email address of `projects_step_terraform_service_account_email` that is created by the Terraform Example Foundation 0-bootstrap step.
 
 **Notes:**