reword "cluster applying"

Co-authored-by: Adrian Stobbe <[email protected]>

rfc/terraform-provider.md

@@ -82,7 +82,7 @@ data "constellation_image" "foo" {
 
 The `constellation_cluster` resource is the main resource implemented by the provider.
 It resembles a Constellation cluster with a specific configuration.
-Applying it will create the cluster if not existing *or* if the required updates can't be performed in-place (e.g. changing the master secret),
+Applying it will create the cluster if not existing, upgrade the cluster when the changes can be performed in place (e.g. K8s / node image / microservice update) *or* recreate the resource when the update can't be performed in-place (e.g. changing the master secret).
 updates it with the according configuration if already existing, or deletes it if not present in the configuration but in the state.
 
 The "constellation_attestation" and "constellation_image" objects are [data sources](https://developer.hashicorp.com/terraform/language/data-sources),