Fixed relative link for image

Signed-off-by: Thomas Runyon <runyontr@gmail.com>

docs/about.md

@@ -66,8 +66,8 @@ This allows restore functionality to work in a cluster migration scenario, where
 
 Likewise, if a backup object exists in Kubernetes but not in object storage, it will be deleted from Kubernetes since the backup tarball no longer exists.
 
-[19]: /img/backup-process.png
+[19]: /docs/img/backup-process.png
 [20]: https://kubernetes.io/docs/concepts/api-extension/custom-resources/#customresourcedefinitions
 [21]: https://kubernetes.io/docs/concepts/api-extension/custom-resources/#custom-controllers
 [22]: https://github.com/coreos/etcd
-[30]: https://github.com/heptio/ark/blob/master/docs/cli-reference/ark_create_backup.md
+[30]: https://github.com/heptio/ark/blob/master/docs/cli-reference/ark_create_backup.md