docs: link to price medianizer

Author: jaybuidl

src/adapters/price-oracle/makerDAOFeed/getEthPriceUsd.js

@@ -6,7 +6,7 @@ import abi from './assets/MedianEthUsd.json';
 const providerUrl = RPC_URLS[1];
 const provider = new Web3.providers.HttpProvider(providerUrl);
 const web3 = new Web3(provider);
-const contract = new web3.eth.Contract(abi, '0x64de91f5a373cd4c28de3600cb34c7c6ce410c85');
+const contract = new web3.eth.Contract(abi, '0x64de91f5a373cd4c28de3600cb34c7c6ce410c85'); // https://mips.makerdao.com/mips/md-viewer#active-oracle-list
 
 async function getPriceFromLatestBlocks({ fromBlock }) {
   const events = await contract.getPastEvents('LogMedianPrice', {