Documentation: expires_at in gitlab_project_access_token is now required and last at most 365 days

Bug Report

1. Current docs displays expires_at as optional argument. However 16.0.0 docs mentions that this argument is required. It would be perfect to move that expires_at in docs to required paragraph.
2. Additionally expires_at should last at most 365 days from current day. How about linking docs or mention about this limitation? It would be less confusing for users.

I can create MR for it.

Relevant Terraform Configuration

resource "gitlab_project_access_token" "example" {
  project      = "25"
  name         = "Example project access token"
  expires_at   = "2030-03-14" # At most 365 days and it is required
  access_level = "reporter"

  scopes = ["api"]
}

Relevant Terraform Command

terraform apply -target='gitlab_project_access_token.example'

Relevant Log Output

These are the debug logs of the `terraform` command output:

POST https://gitlab.com/api/v4/projects/XXXXXXXXXXX/access_tokens: 400 {message: 400 Bad request - Expires at must expire in 365 days}

Additional Details

• GitLab Terraform Provider Version: 16.0.3
• GitLab Version: 16.0.0
• Terraform Version: 1.4.6