Update events README.md (aws#135)

Author: bmoffatt

aws-lambda-java-events/README.md

@@ -3,8 +3,10 @@
 ### Event Models Supported
 * `APIGatewayProxyRequestEvent`
 * `APIGatewayProxyResponseEvent`
-* `APIGatewayV2ProxyRequestEvent`
-* `APIGatewayV2ProxyResponseEvent`
+* `APIGatewayV2HTTPEvent`
+* `APIGatewayV2HTTPResponse`
+* `APIGatewayV2WebSocketEvent`
+* `APIGatewayV2WebSocketResponse`
 * `ApplicationLoadBalancerRequestEvent`
 * `ApplicationLoadBalancerResponseEvent`
 * `CloudFrontEvent`
@@ -70,4 +72,4 @@
 ```scala
 "com.amazonaws" % "aws-lambda-java-core" % "1.2.1"
 "com.amazonaws" % "aws-lambda-java-events" % "3.0.0"
-```
+```