mention floe map state fields not yet supported

Author: nasark

managing_providers/_topics/embedded_workflows.md

@@ -167,6 +167,14 @@ Workflows must be authored in Amazon State Languages (ASL) format. As part of au
 
    **Note**: The current implementation of the Amazon States Language does not support **Map** states.
 
+   #### Unsupported States Language Features
+
+    The following are not yet supported for Floe:
+    - Map State Fields:
+      - ItemReader
+      - ItemSelector/ItemBatcher
+      - ResultWriter
+
 2. Build the docker containers that are required for the workflow.
 
    When you have the code for your task resource written, you need to bundle it into a docker image. You can bundle the code by creating a standard [Dockerfile](https://docs.docker.com/engine/reference/builder/) and building the image (https://docs.docker.com/engine/reference/commandline/build/). Then, you can push the image to a [registry](https://docs.docker.com/engine/reference/commandline/push/), which makes the image available to be used by {{ site.data.product.title_short }}. When you have pushed your images to an image registry, you can add the registry to {{ site.data.product.title_short }}.