Update aws-go-webserver to use VpcSecurityGroupIds, not `Security…

…Groups`. (#596)

`SecurityGroups` doesn't allow for updates while `VpcSecurityGroupIds` does.

See pulumi/pulumi-aws#852 for more context.

aws-go-webserver/main.go

@@ -41,10 +41,10 @@ func main() {
 
  // Create a simple web server using the startup script for the instance.
  srv, err := ec2.NewInstance(ctx, "web-server-www", &ec2.InstanceArgs{
- Tags: pulumi.Map{"Name": pulumi.String("web-server-www")},
- InstanceType: pulumi.String("t2.micro"), // t2.micro is available in the AWS free tier.
- SecurityGroups: pulumi.StringArray{group.Name},
- Ami: pulumi.String(ami.Id),
+ Tags:  pulumi.Map{"Name": pulumi.String("web-server-www")},
+ InstanceType:  pulumi.String("t2.micro"), // t2.micro is available in the AWS free tier.
+ VpcSecurityGroupIds: pulumi.StringArray{group.ID()},
+ Ami:  pulumi.String(ami.Id),
  UserData: pulumi.String(`#!/bin/bash
 echo "Hello, World!" > index.html
 nohup python -m SimpleHTTPServer 80 &`),