Update READMEs, fix links (#7176)

* Re-generate READMEs to fix doc links; set readme field in package manifests

* Re-generate READMEs to fix doc links; set readme field in package manifests

* Re-generate READMEs to fix doc links; set readme field in package manifests

* Re-generate READMEs to fix doc links; set readme field in package manifests

* Revert stuff that shouldn't have been committed

* Revert stuff that shouldn't have been committed

* Fix parent relative link generation

* Manually remove this incorrect link for now.

substrate/frame/example/README.md

@@ -45,9 +45,9 @@ Copy and paste this template from frame/example/src/lib.rs into file
 // Include the following links that shows what trait needs to be implemented to use the pallet
 // and the supported dispatchables that are documented in the Call enum.
 
-- \[`<INSERT_CUSTOM_PALLET_NAME>::Trait`](./trait.Trait.html)
-- \[`Call`](./enum.Call.html)
-- \[`Module`](./struct.Module.html)
+- \[`<INSERT_CUSTOM_PALLET_NAME>::Trait`](https://docs.rs/pallet-example/latest/pallet_example/trait.Trait.html)
+- \[`Call`](https://docs.rs/pallet-example/latest/pallet_example/enum.Call.html)
+- \[`Module`](https://docs.rs/pallet-example/latest/pallet_example/struct.Module.html)
 
 \## Overview