Added link to GuestInfo example
This patch adds a link to the GoVmomi example for setting GuestInfo.
diff --git a/README.md b/README.md
index b7b2bb2..45e2ebd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
# Cloud-Init Datasource for VMware GuestInfo
This project provides a cloud-init datasource for pulling meta,
-user, and vendor data from VMware vSphere's GuestInfo interface.
+user, and vendor data from VMware vSphere's GuestInfo [interface](https://github.com/vmware/govmomi/blob/master/govc/USAGE.md#vmchange).
## Installation
There are multiple methods of installing the data source.