Update Terraform and Rundeck versions in AWS deployment guides

Updated version requirements in AWS and EKS deployment guides to reflect current best practices:
- Terraform requirement updated from 1.1.8 to 1.0 or later
- AWS provider updated from 4.11.0 to ~> 5.0
- Rundeck container image updated from 4.8.0 to 5.8.0
- EKS Kubernetes version updated from 1.23 to 1.31

Author: fdevans

docs/learning/howto/how2-terra-rd-aws.md

@@ -8,9 +8,9 @@ In this guide, we will show you how to deploy Rundeck (or commercial Runbook Aut
 
 ## Prerequisites
 To complete the tasks in this guide you’ll first need to install the following:<br>
-1. Terraform (available [here](https://www.terraform.io/downloads)).<br>
+1. Terraform 1.0 or later (available [here](https://www.terraform.io/downloads)).<br>
 2. AWS CLI tool (available [here](https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html)), required by the Terraform AWS provider.<br>
-3. Configure the AWS CLI using a valid AWS user. Use the `aws configure` command to configure `aws` using your AWS credentials (AWS Access and Secret keys). <br>
+3. Configure the AWS CLI using a valid AWS user. Use the `aws configure` command to configure `aws` using your AWS credentials (AWS Access and Secret keys).<br>
 
 ## Deployment of Rundeck as a Terraform project
 Create an SSH keypair to interact with AWS in order to use the code. Create an example private key named `example` and a public key named `example.pub`, and run the following command in terminal (substituting the path to your project directory):<br>
@@ -50,11 +50,11 @@ provider "aws" {
 
 # Terraform requisites
 terraform {
- required_version = ">=1.1.8"
+ required_version = ">=1.0"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
-     version = "4.11.0"
+     version = "~> 5.0"
    }
  }
 }

docs/learning/howto/how2-terra-rd-eks.md

@@ -32,7 +32,7 @@ When prompted, provide the AWS access and secret key.<br>
 EKS CLI is linked to AWS CLI. If AWS CLI was configured successfully in the previous step, create an EKS cluster with the following command.<br>
 
 ```
-eksctl create cluster --name oss-test-cluster --version 1.23 --region eu-north-1 --nodegroup-name test-workers --node-type t3.xlarge --nodes 3 --nodes-min 1 --nodes-max 4 --managed
+eksctl create cluster --name oss-test-cluster --version 1.31 --region eu-north-1 --nodegroup-name test-workers --node-type t3.xlarge --nodes 3 --nodes-min 1 --nodes-max 4 --managed
 ```
 
 Included parameters:<br>
@@ -133,7 +133,7 @@ spec:
    spec:
      containers:
      - name: rundeck
-       image: rundeck/rundeck:4.8.0
+       image: rundeck/rundeck:5.8.0
        env:
        - name: RUNDECK_GRAILS_URL
          value: "http://service_url:4440"