This referenda bumps the `AsyncBackingParams.max_candidate_depth` value from 3 to 6.
This is needed in order to allow the use of Elastic Scaling MVP with up to 3 cores per parachain. Learn more about this [here](https://paritytech.github.io/polkadot-sdk/master/polkadot_sdk_docs/guides/enable_elastic_scaling_mvp/index.html#prerequisites)

Whitelisted by https://kusama.subsquare.io/fellowship/referenda/87

- Problem Statement: Increase `AsyncBackingParams.max_candidate_depth` from 3 to 6 for Elastic Scaling MVP.
- Significance: Enables Elastic Scaling MVP with up to 3 cores per parachain.
- Proposed Solution: Increase `AsyncBackingParams.max_candidate_depth` value.
- Expected Outcomes: Enhanced scalability and performance for Elastic Scaling MVP.

#455 [Whitelisted Caller] Set AsyncBackingParams.max_candidate_depth to 6