Change some outdate references to Vagrant Cloud to point to Atlas instead

website/source/docs/post-processors/atlas.html.markdown

@@ -40,7 +40,7 @@ The configuration allows you to specify and access the artifact in Atlas.
 * `artifact_type` (string) - For uploading AMIs to Atlas, `artifact_type` will always be `amazon.ami`.
   This field must be defined because Atlas can host other artifact types, such as Vagrant boxes.
 
--> **Note:** If you want to upload Vagrant boxes to Atlas, for now use the [Vagrant Cloud post-processor](/docs/post-processors/vagrant-cloud.html).
+-> **Note:** If you want to upload Vagrant boxes to Atlas, use the [Atlas post-processor](/docs/post-processors/atlas.html).
 
 ### Optional:
 

website/source/docs/post-processors/vagrant-cloud.html.markdown

@@ -7,6 +7,8 @@ description: |-
 
 # Vagrant Cloud Post-Processor
 
+~> Vagrant Cloud has been superseded by Atlas. Please use the [Atlas post-processor](/docs/post-processors/atlas.html) instead. Learn more about [Atlas](https://atlas.hashicorp.com/).
+
 Type: `vagrant-cloud`
 
 The Packer Vagrant Cloud post-processor receives a Vagrant box from the `vagrant`