added annotation to the service account and env var for region

cluster-autoscaler/cloudprovider/aws/examples/cluster-autoscaler-autodiscover.yaml

@@ -5,6 +5,8 @@ metadata:
   labels:
     k8s-addon: cluster-autoscaler.addons.k8s.io
     k8s-app: cluster-autoscaler
+  annotations:
+    eks.amazonaws.com/role-arn: arn:aws:iam::<account_number>:role/<YOUR_IAM_ROLE_NAME>
   name: cluster-autoscaler
   namespace: kube-system
 ---
@@ -163,6 +165,9 @@ spec:
             - --skip-nodes-with-local-storage=false
             - --expander=least-waste
             - --node-group-auto-discovery=asg:tag=k8s.io/cluster-autoscaler/enabled,k8s.io/cluster-autoscaler/<YOUR CLUSTER NAME>
+          env:
+            - name: AWS_REGION
+              value: ap-south-1 # Change to your AWS region
           volumeMounts:
             - name: ssl-certs
               mountPath: /etc/ssl/certs/ca-certificates.crt # /etc/ssl/certs/ca-bundle.crt for Amazon Linux Worker Nodes