This proposal is to cancel the proposal #8 to upgrade Moonriver to RT2302, as that same runtime was proposed also through the WhiteList track in order to get it enacted faster by the community.

Cancel an ongoing referendum.

- `origin`: must be the `CancelOrigin`.
- `index`: The index of the referendum to be cancelled.

Emits `Cancelled`.

- **Problem Statement:** Polkassembly ReferendumV2 proposes upgrading the runtime to v26, citing specific changes like fixing logging issues and making certain functions unsafe.
- **Significance:** Medium priority upgrade due to critical fixes and changes in functionality.
- **Proposed Solution:** Upgrade the runtime to v26 to implement necessary fixes and improvements.
- **Expected Outcomes:** Improved logging, enhanced functionality, and increased security with the upgrade to v26.

#11 Cancel RT2302 Upgrade #8