`always_free` example fails out of the box

[nk9]

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Terraform Version and Provider Version

1.6.4

Affected Resource(s)

affected_resources = tls_self_signed_cert

Terraform Configuration Files

https://github.com/oracle/terraform-provider-oci/blob/master/examples/always_free/main.tf

resource "tls_self_signed_cert" "example" {
  key_algorithm   = "ECDSA"
  private_key_pem = tls_private_key.example.private_key_pem

  subject {
    organization = "Oracle"
    country      = "US"
    locality     = "Austin"
    province     = "TX"
  }

  validity_period_hours = 8760 # 1 year

  allowed_uses = [
    "key_encipherment",
    "digital_signature",
    "server_auth",
    "client_auth",
    "cert_signing"
  ]

  is_ca_certificate = true
}

Expected Behavior

I'd expect the always_free example to work out of the box.

Actual Behavior

When you use the code as written, you get this error:

╷
│ Error: Invalid Configuration for Read-Only Attribute
│
│   with tls_self_signed_cert.example,
│   on main.tf line 301, in resource "tls_self_signed_cert" "example":
│   301:   key_algorithm   = "ECDSA"
│
│ Cannot set value for this attribute as the provider has marked it as
│ read-only. Remove the configuration line setting the value.
│
│ Refer to the provider documentation or contact the provider developers for
│ additional information about configurable and read-only attributes that are
│ supported.
╵

Steps to Reproduce

1. terraform apply

Important Factoids

The error goes away when I comment out the line.

References

https://registry.terraform.io/providers/hashicorp/tls/latest/docs/resources/self_signed_cert#cert_pem