Update README.md

SwitchEngines/README.md

@@ -523,7 +523,7 @@ to the official TF documentation for the [OpenStack
 provider](https://registry.terraform.io/providers/terraform-provider-openstack/openstack/latest/docs/), you shall:
 
   1. Destroy your infrastructure. Guess how ;-)
-  1. Create an SSH key pair `tf-cloud-init`.
+  1. Create an SSH key pair named `tf-cloud-init` either via the Horizon GUI or locally (must be RSA type).
   1. Create a new cloud-init file
      `~/terraform/OpenStack/scripts/add-ssh.yaml` with the following content:
      ``` yaml