docs: Fix broken documentation links for pallets (#13241)

Fixes broken links to `Config` and `Call`, for READMEs the link has
been fixed by adding the missing "/pallet" path, and for rust docs we
let the compiler figure out the type's link by itself

Signed-off-by: Jonathas-Conceicao <jonathasaoc@gmail.com>

substrate/frame/multisig/README.md

@@ -1,8 +1,8 @@
 # Multisig Module
 A module for doing multisig dispatch.
 
-- [`multisig::Config`](https://docs.rs/pallet-multisig/latest/pallet_multisig/trait.Config.html)
-- [`Call`](https://docs.rs/pallet-multisig/latest/pallet_multisig/enum.Call.html)
+- [`Config`](https://docs.rs/pallet-multisig/latest/pallet_multisig/pallet/trait.Config.html)
+- [`Call`](https://docs.rs/pallet-multisig/latest/pallet_multisig/pallet/enum.Call.html)
 
 ## Overview
 

substrate/frame/multisig/src/lib.rs

@@ -39,9 +39,6 @@
 //!   number of signed origins.
 //! * `approve_as_multi` - Approve a call from a composite origin.
 //! * `cancel_as_multi` - Cancel a call from a composite origin.
-//!
-//! [`Call`]: ./enum.Call.html
-//! [`Config`]: ./trait.Config.html
 
 // Ensure we're `no_std` when compiling for Wasm.
 #![cfg_attr(not(feature = "std"), no_std)]