Update Readme with doit's new location

doit has been moved and renamed to doctl
diff --git a/README.md b/README.md
index cad242d..4ebd8dd 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 * [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
 * [Docker Notary](https://github.com/docker/Notary)
 * [BloomApi](https://www.bloomapi.com/)
-* [DOIt](https://github.com/bryanl/doit)
+* [doctl(https://github.com/digitalocean/doctl)
 
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