This motion increases the active collator set size to 12, i.e. every round (currently approximately 2 hours) the top 12 collators by total stake (self stake + delegated stake) will be selected as block authors during the next round.

Zeitgeist would like to increase the collator set size during the course of time to achieve more robustness and decentralization in the network. The increments should happen in small steps to ensure, that the network is capable of handling addition collators without experiencing drawbacks.

Schedule a majority-carries referendum to be tabled next once it is legal to schedule
an external referendum.

The dispatch of this call must be `ExternalMajorityOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

Set the total number of collator candidates selected per round
- changes are not applied until the start of the next round

- **Problem Statement:** Increasing the active collator set size to 12 for better network robustness and decentralization.
- **Significance:** Incremental increase in collator set size aims to enhance network capacity without causing issues.
- **Proposed Solution:** Gradually increase collator set size to 12 for improved network robustness.
- **Expected Outcomes:** Enhanced network decentralization and robustness with a larger collator set size.

#7 Increase active collator set size to 12 - motion #7