This is a proposal to authorize upgrading Moonriver to Runtime 4300.


Please see the [forum post](https://forum.moonbeam.network/t/runtime-rt4300-schedule/2469) for the release schedule and more details.

Release notes:

https://github.com/moonbeam-foundation/moonbeam/releases/tag/runtime-4300

Verification Blake2\_256 Hash:

0xec2fa70026e8d23324c7ecc9dfd3da634fb2e1eac49d945056b2523aec955e5e

If you want to apply the best practices and verify the hash of the proposal, we advise you to use srtool.

Authorize an upgrade to a given `code_hash` for the runtime. The runtime can be supplied
later.

This call requires Root origin.

#99 Authorize Upgrade to RT4300 on Moonriver