If this referenda passes the Substrate Framework version used by Cere Network will be updated to 0.9.20 represented in [Release v2.35.0](https://github.com/Cerebellum-Network/pos-network-node/releases/tag/v2.35.0)

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 referendum about updating a computer program called Substrate Framework.
- If the referendum passes, the program will be updated to version 0.9.20.
- This update is important for a network called Cere Network.
- The update is represented in a release called v2.35.0.
- People are voting to decide if the update should happen.

#21 Update Cere Node runtime to v2.35.0