update link to new doc and add new doc to sitemap (#1061)

Author: andie787

apps/migrate-to-v2.html.markerb

@@ -147,7 +147,7 @@ We recommend updating such Machines to use the `always` restart policy, to ensur
 fly machine update --restart always <machine-id>
 ```
 
-See [more about restart policies here](https://community.fly.io/t/issues-with-machines-restart-policy/11943/25).
+Learn more about [Machine restart policies](/docs/machines/guides-examples/machine-restart-policy/).
 
 
 ### Scale your deployed Machine(s)

machines/guides-examples/machine-restart-policy.html.markerb

@@ -1,7 +1,6 @@
 ---
 title: Machine restart policy
 layout: framework_docs
-sitemap: false
 order: 35
 nav: firecracker
 ---