fix: update provider.tf file (#37)

Author: caroldelwing

terraform/vmware-cluster-deployment-tf/provider.tf

@@ -4,7 +4,7 @@
 terraform {
   required_providers {
     spectrocloud = {
-      version = ">= 0.17.4"
+      version = ">= 0.19.0-pre"
       source  = "spectrocloud/spectrocloud"
     }
 
@@ -28,4 +28,4 @@ terraform {
 provider "spectrocloud" {
   # API key set through the environment variable SPECTROCLOUD_APIKEY
   project_name = "Default"
-}
+}