docs: Add ebs disk in complete example (#2773)

📝 (complete) Add ebs disk in complete example

Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>

examples/complete/main.tf

@@ -189,6 +189,19 @@ module "eks" {
         }
       }
 
+      block_device_mappings = {
+        xvda = {
+          device_name = "/dev/xvda"
+          ebs = {
+            volume_size           = 100
+            volume_type           = "gp3"
+            iops                  = 3000
+            throughput            = 150
+            delete_on_termination = true
+          }
+        }
+      }
+
       update_config = {
         max_unavailable_percentage = 33 # or set `max_unavailable`
       }