[docs] Fix yaml Spacing in Rancher Terraform

[jmeza-xyz]

Problem:

PR fixes the incorrect yaml spacing in the Rancher Terraform doc, as well as updates the K8s/terraform versions per the Harvester support matrix.

Current:

     required_providers {
         rancher2 = {
             source  = "rancher/rancher2"
             version = "4.2.0"
             }
         }
     }

     resource "rancher2_cluster_v2" "rke2-demo" {
         name = "rke2-demo"
         kubernetes_version = "v1.28.10+rke2r1"
         rke_config {
             machine_pools {
                 name = "pool1"

        chart_values = <<EOF
        harvester-cloud-provider:
        clusterName: rke2-demo
        cloudConfigPath: /var/lib/rancher/rke2/etc/config-files/cloud-provider-config
        EOF

Solution:

Updated:

     required_providers {
         rancher2 = {
             source  = "rancher/rancher2"
-            version = "4.2.0"
+            version = "13.1.4"
             }
         }
     }

     resource "rancher2_cluster_v2" "rke2-demo" {
         name = "rke2-demo"
-        kubernetes_version = "v1.28.10+rke2r1"
+        kubernetes_version = "v1.34.6+rke2r1"
         rke_config {
             machine_pools {
                 name = "pool1"

             chart_values = <<EOF
             harvester-cloud-provider:
-            clusterName: rke2-demo
-            cloudConfigPath: /var/lib/rancher/rke2/etc/config-files/cloud-provider-config
+              clusterName: rke2-demo
+              cloudConfigPath: /var/lib/rancher/rke2/etc/config-files/cloud-provider-config
             EOF

Related Issue(s):

Issue # harvester/harvester#10331

Test plan:

N/A

Additional documentation or context

N/A

[github-actions]

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