update README

Author: James Zhou

README.md

@@ -94,7 +94,8 @@ CloudGraph AWS Provider will ask you what regions you would like to crawl and wi
 | customerGateway             | vpnConnection                                                                                                                                                                                                                                                                                                                                                                 |
 | dynamodb                    | appSync, iamRole, kms                                                                                                                                                                                                                                                                                                                                                         |
 | dmsReplicationInstance      | securityGroup, subnet, vpc, kms                                                                                                                                                                                                                                                                                                                                               |
-| ebs                         | asg, ec2, emrInstance                                                                                                                                                                                                                                                                                                                                                         |
+| ebs                         | asg, ec2, emrInstance, ebsSnapshot                                                                                                                                                                                                                                                                                                                                            |
+| ebsSnapshot                 | ebs                                                                                                                                                                                                                                                                                                                                                                           |
 | ec2                         | alb, asg, ebs, eip, emrInstance, eksCluster, elasticBeanstalkEnv, iamInstanceProfile, iamRole, networkInterface, securityGroup, subnet, systemsManagerInstance, vpc, ecsContainer                                                                                                                                                                                             |
 | ecr                         |                                                                                                                                                                                                                                                                                                                                                                               |
 | ecsCluster                  | cloudwatchLog, ecsService, ecsTask, ecsTaskSet, kms, s3                                                                                                                                                                                                                                                                                                                       |