When modifying the terraform configuration file for a VPC Cluster that has already been deployed, running terraform apply will result in the following error:

Plan: 0 to add, 1 to change, 0 to destroy.
couchbasecapella_vpc_cluster.cluster: Modifying... [id=<cluster-id>]
╷
│ Error: doesn't support update
│ 
│   with couchbasecapella_vpc_cluster.cluster,
│   on main.tf line 11, in resource "couchbasecapella_vpc_cluster" "cluster":
│   11: resource "couchbasecapella_vpc_cluster" "cluster" {
│ 
╵
Releasing state lock. This may take a few moments...
ERRO[0046] 1 error occurred:
        * exit status 1

The expected behaviour should be to delete the currently deployed VPC Cluster and then recreate it with the updated configuration.

I've added ForceNew: true to all fields of resource_couchbasecapella_vpc_cluster.go. ForceNew: true tells Terraform that any change to this field should result in the deletion and recreation of the resource.

This change fixes #17.