NNS Updates: May 12 - CMC Hotfix

Updated Hotfix Proposal

Proposal 122286 was submitted with an empty upgrade argument in the proposal. This proposal will be rejected by Dfinity.

Proposal 122287 was submitted with the following updated upgrade arg.

## Proposal to Upgrade the Cycles-minting Canister
### Proposer: DFINITY Foundation
### Git Hash: e813c43a337a26c026c2f2ec19099bd2036e7280
### New Wasm Hash: fc1655302a81cd1b7148a6f66479b2830bd0d567d04780720e7bdd6c5b124fb5
### Upgrade Args Hash: 5349c151a3353dd72f924409229c28f2ab1d9d70f8f8c7e81842ab5e18757803
### Target canister: rkp4c-7iaaa-aaaaa-aaaca-cai
---
## Features
- Fix a bug in the Cycles-Minting Canister where the average ICP/XDR rate was not updated.
## Release Notes
```
$ git log --format="%C(auto) %h %s" 2ef275ecee0b8e2e6eba06d13ff4585ba8957f2e..e813c43a337a26c026c2f2ec19099bd2036e7280 --  ./rs/nns/cmc
 6f1ce5e472 bugfix: Moving update_recent_icp_xdr_rates into set_icp_xdr_conversion_rate
```
## Candid Post Upgrade Args
```candid
(record { governance_canister_id = principal "rrkah-fqaaa-aaaaa-aaaaq-cai"; ledger_canister_id = principal "ryjl3-tyaaa-aaaaa-aaaba-cai"; exchange_rate_canister = opt variant { Set = principal "uf6dk-hyaaa-aaaaq-qaaaq-cai" } })
```
### Validating Candid Args
Verify that the hash of the args matches proposal contents.
`didc encode '(record { governance_canister_id = principal "rrkah-fqaaa-aaaaa-aaaaq-cai"; ledger_canister_id = principal "ryjl3-tyaaa-aaaaa-aaaba-cai"; exchange_rate_canister = opt variant { Set = principal "uf6dk-hyaaa-aaaaq-qaaaq-cai" } })' | xxd -r -p | sha256sum`
## Wasm Verification
Verify that the hash of the gzipped WASM matches the proposed hash.
```
git fetch
git checkout e813c43a337a26c026c2f2ec19099bd2036e7280
./gitlab-ci/container/build-ic.sh -c
sha256sum ./artifacts/canisters/cycles-minting-canister.wasm.gz
```
## Current Version
- Current Git Hash: 2ef275ecee0b8e2e6eba06d13ff4585ba8957f2e
- Current Wasm Hash: 3ff03b40f1c49b06e91a3c31879a21f6cead42be71d194d4d7e7becb8c60bd42
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