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/nicks/Cargo.toml

@@ -7,6 +7,7 @@ license = "Apache-2.0"
 homepage = "https://substrate.dev"
 repository = "https://github.com/paritytech/substrate/"
 description = "FRAME pallet for nick management"
+readme = "README.md"
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]

substrate/frame/nicks/README.md

@@ -1,12 +1,14 @@
 # Nicks Module
 
-- [`nicks::Trait`](./trait.Trait.html)
-- [`Call`](./enum.Call.html)
+- [`nicks::Trait`](https://docs.rs/pallet-nicks/latest/pallet_nicks/trait.Trait.html)
+- [`Call`](https://docs.rs/pallet-nicks/latest/pallet_nicks/enum.Call.html)
 
 ## Overview
 
-Nicks is a trivial module for keeping track of account names on-chain. It makes no effort to
-create a name hierarchy, be a DNS replacement or provide reverse lookups.
+Nicks is an example module for keeping track of account names on-chain. It makes no effort to
+create a name hierarchy, be a DNS replacement or provide reverse lookups. Furthermore, the
+weights attached to this module's dispatchable functions are for demonstration purposes only and
+have not been designed to be economically secure. Do not use this pallet as-is in production.
 
 ## Interface