readme me modified for node pool creation

Author: mikarinneoracle

app-dev/devops-and-containers/oke/oke-rm/README.md

@@ -56,7 +56,7 @@ By using this feature, we can modify the stack we deployed in Step 2 and add the
 
 ![Edit Terraform configurations](images/edit_oci_stack.png)
 
-Instructions on how to modify the stack and add node pools can be found in comments on the bottom of the <code>oke.tf file</code>. Set <code>create = true</code> on the pool you want to be added by Terraform.
+Instructions on how to modify the stack and add node pools can be found in comments on the bottom of the <code>oke.tf</code> file. Set <code>create = true</code> on the pool you want to be added by Terraform.
 
 Alternatively, clone this repo locally and edit <code>oke.tf file</code> to add a node pool and then load the folder including the modified Terraform to your RM stack: