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/frame/support/src/dispatch.rs

@@ -306,7 +306,7 @@ impl<T> Parameter for T where T: Codec + EncodeLike + Clone + Eq + fmt::Debug +
 ///
 /// The following are reserved function signatures:
 ///
-/// * `deposit_event`: Helper function for depositing an [event](https://docs.substrate.io/v3/runtime/events-and-errors).
+/// * `deposit_event`: Helper function for depositing an [event](https://docs.substrate.io/main-docs/build/events-errors/).
 /// The default behavior is to call `deposit_event` from the [System
 /// module](../frame_system/index.html). However, you can write your own implementation for events
 /// in your runtime. To use the default behavior, add `fn deposit_event() = default;` to your

substrate/frame/support/src/traits/misc.rs

@@ -763,7 +763,7 @@ impl<T: MaxEncodedLen> MaxEncodedLen for WrapperOpaque<T> {
 	fn max_encoded_len() -> usize {
 		let t_max_len = T::max_encoded_len();
 
-		// See scale encoding https://docs.substrate.io/v3/advanced/scale-codec
+		// See scale encoding: https://docs.substrate.io/reference/scale-codec/
 		if t_max_len < 64 {
 			t_max_len + 1
 		} else if t_max_len < 2usize.pow(14) {