Remove the wrong SECURITY_GROUP_ID variable (#1516)

There are two SECURITY_GROUP_ID variables in this doc, and obviously the first one is wrong.

Author: xiuleiyy

content/beginner/190_fsx_lustre/launching-fsx.md

@@ -31,7 +31,6 @@ ACCOUNT_ID=$(aws sts get-caller-identity --query "Account" --output text)
 CLUSTER_NAME=eksworkshop-eksctl
 VPC_ID=$(aws eks describe-cluster --name $CLUSTER_NAME --query "cluster.resourcesVpcConfig.vpcId" --output text)
 SUBNET_ID=$(aws eks describe-cluster --name $CLUSTER_NAME --query "cluster.resourcesVpcConfig.subnetIds[0]" --output text)
-SECURITY_GROUP_ID=$(aws eks describe-cluster --name $CLUSTER_NAME --query "cluster.resourcesVpcConfig.securityGroupIds" --output text)
 CIDR_BLOCK=$(aws ec2 describe-vpcs --vpc-ids $VPC_ID --query "Vpcs[].CidrBlock" --output text)
 S3_LOGS_BUCKET=eks-fsx-lustre-$(cat /dev/urandom | LC_ALL=C tr -dc "[:alpha:]" | tr '[:upper:]' '[:lower:]' | head -c 32)
 SECURITY_GROUP_ID=$(aws eks describe-cluster --name $CLUSTER_NAME --query "cluster.resourcesVpcConfig.clusterSecurityGroupId" --output text)