Add missing Prerequisites header in enable-iam-roles-for-service-accounts.adoc (#1133)

Author: ajoga

latest/ug/manage-access/aws-access/enable-iam-roles-for-service-accounts.adoc

@@ -12,6 +12,8 @@ Learn how to create an {aws} Identity and Access Management OpenID Connect provi
 
 Your cluster has an https://openid.net/connect/[OpenID Connect] (OIDC) issuer URL associated with it. To use {aws} Identity and Access Management (IAM) roles for service accounts, an IAM OIDC provider must exist for your cluster's OIDC issuer URL.
 
+== Prerequisites
+
 * An existing Amazon EKS cluster. To deploy one, see <<getting-started>>.
 * Version `2.12.3` or later or version `1.27.160` or later of the {aws} Command Line Interface ({aws} CLI) installed and configured on your device or {aws} CloudShell. To check your current version, use `aws --version | cut -d / -f2 | cut -d ' ' -f1`. Package managers such `yum`, `apt-get`, or Homebrew for macOS are often several versions behind the latest version of the {aws} CLI. To install the latest version, see link:cli/latest/userguide/cli-chap-install.html[Installing, updating, and uninstalling the {aws} CLI,type="documentation"] and link:cli/latest/userguide/cli-configure-quickstart.html#cli-configure-quickstart-config[Quick configuration with aws configure,type="documentation"] in the _{aws} Command Line Interface User Guide_. The {aws} CLI version that is installed in {aws} CloudShell might also be several versions behind the latest version. To update it, see link:cloudshell/latest/userguide/vm-specs.html#install-cli-software[Installing {aws} CLI to your home directory,type="documentation"] in the _{aws} CloudShell User Guide_.
 * The `kubectl` command line tool is installed on your device or {aws} CloudShell. The version can be the same as or up to one minor version earlier or later than the Kubernetes version of your cluster. For example, if your cluster version is `1.29`, you can use `kubectl` version `1.28`, `1.29`, or `1.30` with it. To install or upgrade `kubectl`, see <<install-kubectl>>.