intro-to-tbc price feed use update
Clarify that `SatWeiPriceFeed` utilizes a price feed
operated by MakerDao, not that it is operated by MkerDao itself.
@@ -87,7 +87,7 @@ The redemption flow is as follows:
The "happy paths" have been covered, but there hasn't been discussion of when *things fall apart*.
-To disincentivise signers from stealing bitcoin, deposits are overcollateralised with ETH. The collateral is priced using an on-chain [ETH:BTC price feed](https://github.com/keep-network/tbtc/blob/master/solidity/contracts/price-feed/SatWeiPriceFeed.sol), which is operated by MakerDAO. This collateral also ensures guarantees of signer availability within the protocol.
+To disincentivise signers from stealing bitcoin, deposits are overcollateralised with ETH. The collateral is priced using an on-chain [ETH:BTC price feed](https://github.com/keep-network/tbtc/blob/master/solidity/contracts/price-feed/SatWeiPriceFeed.sol), which works using a price-feed operated by MakerDAO. This collateral also ensures guarantees of signer availability within the protocol.
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