Fix docs urls (#11966)

* Fix docs urls

* Update bin/node-template/README.md

* Update frame/aura/src/lib.rs

* Run cargo +nightly fmt

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/bin/node-template/pallets/template/src/lib.rs

@@ -2,7 +2,7 @@
 
 /// Edit this file to define custom logic or remove it if it is not needed.
 /// Learn more about FRAME and the core library of Substrate FRAME pallets:
-/// <https://docs.substrate.io/v3/runtime/frame>
+/// <https://docs.substrate.io/reference/frame-pallets/>
 pub use pallet::*;
 
 #[cfg(test)]
@@ -31,15 +31,15 @@ pub mod pallet {
 	pub struct Pallet<T>(_);
 
 	// The pallet's runtime storage items.
-	// https://docs.substrate.io/v3/runtime/storage
+	// https://docs.substrate.io/main-docs/build/runtime-storage/
 	#[pallet::storage]
 	#[pallet::getter(fn something)]
 	// Learn more about declaring storage items:
-	// https://docs.substrate.io/v3/runtime/storage#declaring-storage-items
+	// https://docs.substrate.io/main-docs/build/runtime-storage/#declaring-storage-items
 	pub type Something<T> = StorageValue<_, u32>;
 
 	// Pallets use events to inform users when important changes are made.
-	// https://docs.substrate.io/v3/runtime/events-and-errors
+	// https://docs.substrate.io/main-docs/build/events-errors/
 	#[pallet::event]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
 	pub enum Event<T: Config> {
@@ -68,7 +68,7 @@ pub mod pallet {
 		pub fn do_something(origin: OriginFor<T>, something: u32) -> DispatchResult {
 			// Check that the extrinsic was signed and get the signer.
 			// This function will return an error if the extrinsic is not signed.
-			// https://docs.substrate.io/v3/runtime/origins
+			// https://docs.substrate.io/main-docs/build/origins/
 			let who = ensure_signed(origin)?;
 
 			// Update storage.