Update README.md (#137)

Updated download installation link to target version 1.3.1 instead of 1.2.0

Author: ulisse31

README.md

@@ -54,7 +54,7 @@ The termination handler installs into your cluster a [ServiceAccount](https://ku
 
 You can use kubectl to directly add all of the above resources with the default configuration into your cluster.
 ```
-kubectl apply -f https://github.com/aws/aws-node-termination-handler/releases/download/v1.2.0/all-resources.yaml 
+kubectl apply -f https://github.com/aws/aws-node-termination-handler/releases/download/v1.3.1/all-resources.yaml
 ```
 
 For a full list of releases and associated artifacts see our [releases page](https://github.com/aws/aws-node-termination-handler/releases).