add actionable message (#1542)

Author: Matthew Sweeney

pages/docs/error/application/DEPLOYMENT_BLOCKED.mdx

@@ -6,7 +6,7 @@ export const meta = {
   title: 'Deployment Blocked',
   description: 'The requested deployment was blocked.',
   editUrl: 'pages/docs/error/application/DEPLOYMENT_BLOCKED.mdx',
-  lastEdited: '2019-09-23T15:41:06.000Z'
+  lastEdited: '2020-01-08T08:14:28.000Z'
 }
 
 #### Application Error
@@ -23,6 +23,7 @@ The deployment was blocked by the platform infrastructure layer due to a problem
 
 #### Troubleshoot
 
+- If you have recently downgraded to the Free plan, you will need to redeploy your projects to make them available once again.
 - **[Contact Support](mailto:[email protected])** to see why your deployment was blocked and how to resolve it.
 
 export default ({ children }) => <Standard meta={meta}>{children}</Standard>