Motion 229 increase the number of validators by 1 every era (6hs) for 100 eras. 

The motion was opened since [referendum 88](https://kusama.polkassembly.io/referendum/88) passed but was not able to be executed (for using `after: 0` instead of `after: 1`). I proposed the motion at luckyve's request and given the referendum passed, until we can test and use the [damping function](https://github.com/paritytech/substrate/pull/7231). For this reason as well as for the numbers of waiting validators, I proposed a repetition of 100 instead of 400, as originally proposed.

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

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 pre-scheduled `external_propose` call.

 Weight: `O(1)`

- Motion 229 aims to increase the number of validators by 1 every 6 hours for 100 periods.
- The motion was opened because a previous referendum passed but had a mistake in the execution.
- The motion was proposed to test and use a damping function.
- The motion suggests 100 repetitions instead of the original 400.
- Tl;dr: Motion 229 wants to add more validators over time to test a new function.

#229 Motion 229 replacing Referendum 88 - validators increase.