Update the docs to specify that terraform changes

should be applied locally

docs/howto/filesystem-management/increase-size-aws-ebs.md

@@ -5,7 +5,13 @@ To increase the size of an AWS EBS volume, we need to increase the size of the E
 
 For example, to increase the size of the EBS volume used by `jupyterhub-home-nfs` for the `staging` hub in the `nasa-veda` cluster, we would increase the `size` parameter in the `ebs_volumes` block for the `staging` hub in the [tfvars file for the `nasa-veda` cluster](https://github.com/2i2c-org/infrastructure/blob/main/terraform/aws/projects/nasa-veda.tfvars).
 
-The EBS volume will be resized automatically when the hub is deployed.
+After updating the tfvars file, we need to plan and apply the changes using terraform:
+
+   ```bash
+   cd terraform/aws
+   terraform plan -var-file=projects/$CLUSTER_NAME.tfvars
+   terraform apply -var-file=projects/$CLUSTER_NAME.tfvars
+   ```
 
 ```{note}
 The size of an EBS volume can only be increased, not decreased.