* Substrate companion: Authority discovery multiple peer ids
Authority discovery before had a fixed mapping from `PeerId` to
`AuthorityId`. This wasn't correct, as a `PeerId` can actually map to
multiple `AuthorityId`s. The linked Substrate pr fixes this.
https://github.com/paritytech/substrate/pull/10259
* Update node/network/availability-distribution/src/requester/mod.rs
* Update node/network/collator-protocol/src/validator_side/mod.rs
* Update node/network/statement-distribution/src/tests.rs
* Update guide
* Adapt to Substrate pr
* Update Substrate