Motion 13 is submitted: Polkadot runtime update to v23

Upgrade priority: MEDIUM

Specs of the runtime can be found [here](https://github.com/paritytech/polkadot/releases/tag/v0.8.23).

All Councillors please vote at your convenience. The preimage can be verified in the release notes.

 Schedule the currently externally-proposed majority-carries referendum to be tabled
 immediately. If there is no externally-proposed referendum currently, or if there is one
 but it is not a majority-carries referendum then it fails.

 The dispatch of this call must be `FastTrackOrigin`.

 - `proposal_hash`: The hash of the current external proposal.
 - `voting_period`: The period that is allowed for voting on this proposal. Increased to
   `FastTrackVotingPeriod` if too low.
 - `delay`: The number of block after voting has ended in approval and this should be
   enacted. This doesn't have a minimum amount.

 Emits `Started`.

 # <weight>
 - Complexity: `O(1)`
 - Db reads: `NextExternal`, `ReferendumCount`
 - Db writes: `NextExternal`, `ReferendumCount`, `ReferendumInfoOf`
 - Base Weight: 30.1 µs
 # </weight>

- A motion has been submitted to update Polkadot runtime to version 23.
- The upgrade priority is medium.
- The specifications of the runtime can be found at a specific link.
- All Councillors are requested to vote on this motion.
- A summary of the motion is provided for quick understanding.

#2 SetCode: Polkadot runtime v23