Cloudflare Terraform provider v4 deprecated `value`, use `content`

In Cloudflare’s Terraform provider v4, the value argument on cloudflare_record was deprecated in favor of content. Using value still works but generates warnings on every plan and will break in v5.

# before (v3 style)
resource "cloudflare_record" "api" {
  value = aws_api_gateway_domain_name.this.regional_domain_name
}

# after (v4+)
resource "cloudflare_record" "api" {
  content = aws_api_gateway_domain_name.this.regional_domain_name
}

Easy fix, but easy to miss if you’re copying examples from older blog posts or the provider’s own older docs.