Add note linking to AWS docs (#1247)

Author: mallardduck

docs/resources/cluster.md

@@ -462,6 +462,8 @@ resource "rancher2_cluster" "foo" {
 
 ### Creating EKS cluster from Rancher v2, using `eks_config_v2` and launch template. For Rancher v2.5.6 and above.
 
+Note: To use `launch_template` you must provide the ID (seen as `<EC2_LAUNCH_TEMPLATE_ID>`) to the template either as a static value. Or fetched via AWS data-source using one of: [aws_ami](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami.html), [aws_ami_ids](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami_ids), or similar data-sources. You can also create a custom [`launch_template`](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_template) first and provide the ID to that.
+
 ```hcl
 resource "rancher2_cloud_credential" "foo" {
   name = "foo"
@@ -520,7 +522,7 @@ resource "rancher2_cluster" "foo" {
 
 ### Creating GKE cluster from Rancher v2, using `gke_config_v2`. For Rancher v2.5.8 and above.
 
-**Note:** At the moment, routed-based GKE clusters are not supported due to [rancher/issues/32585]](https://github.com/rancher/rancher/issues/32585)
+**Note:** At the moment, routed-based GKE clusters are not supported due to [rancher/issues/32585](https://github.com/rancher/rancher/issues/32585)
 
 ```hcl
 resource "rancher2_cloud_credential" "foo-google" {