[ARFC] Polygon v2 Borrow Rate Adjustments

The next round of updates (late August) will bring the following Borrow Rate adjustments:

Asset Market Current Slope1 Proposed Slope1
DAI Polygon v2 12.75% 13.50%
USDT Polygon v2 12.75% 13.50%
wBTC Polygon v2 7.75% 8.50%
wETH Polygon v2 7.75% 8.50%
wUSDC Polygon v2 12.75% 13.50%
wMATIC Polygon v2 9.75% 10.5%