The CMC has been upgraded!
The dashboard of the exchange rate canister shows that the CMC (rkp4c-7iaaa-aaaaa-aaaca-cai) requests the rate from the exchange rate canister.
You can verify that the conversion rate proposals stopped a few hours ago on the Internet Computer dashboard (by looking at the Exchange Rate topic) and that the CMC updates the rate successfully using the get_icp_xdr_conversion_rate endpoint.