This proposal aims to upgrade Polkadot runtime to version [0.9.20](https://github.com/paritytech/polkadot/releases/tag/v0.9.20): 

Release notes, runtime changes and proposal hash can be found [HERE](https://github.com/paritytech/polkadot/releases/tag/v0.9.20). On the runtime side, you can check the changes in the link above. Other improvements on the client side for this release include a PR [aiming to reduce bandwidth](https://github.com/paritytech/polkadot/pull/5164) to improve parachain block times, in response to [the issues described on this post](https://kusama.polkassembly.io/post/1424)  

- Call hash for Polkadot upgrade: `0xf94667fb9411092c1c0b2f157021ff871d92c60becfe8cd467a16e6d6ccf4a92`

Feel free to use srtool yourself to check the proposal hash. If passed by the Council, this proposal should be voted by the community and enacted after. Make sure to vote at your convenience!

Set the new runtime code.

# <weight>
- `O(C + S)` where `C` length of `code` and `S` complexity of `can_set_code`
- 1 call to `can_set_code`: `O(S)` (calls `sp_io::misc::runtime_version` which is
  expensive).
- 1 storage write (codec `O(C)`).
- 1 digest item.
- 1 event.
The weight of this function is dependent on the runtime, but generally this is very
expensive. We will treat this as a full block.
# </weight>

- There is a proposal to upgrade Polkadot to version 0.9.20.
- You can find more information about the changes in the release notes.
- There are improvements to reduce bandwidth and improve block times.
- The proposal has a call hash of 0xf94667fb9411092c1c0b2f157021ff871d92c60becfe8cd467a16e6d6ccf4a92.
- The community will vote on the proposal.

#63 Polkadot Runtime Upgrade to v9200