Prop 207: Restore NOTE adjustCoefficient from 5% -> 0.25%

In proposal #201 the rate of change for NOTE interest was accelerated. This faster rate of change was intended to the NOTE mechanism operate and restore peg faster by allowing rates to increase and decrease more quickly. As discussed in proposal #206 this has not happened, instead since RWA liquidations are so slow the faster rate of interest change has instead simply increased the risk of bad debt accumulating. This change combined with the RWA collateral factor change in #206 will hopefully provide potential RWA liquidators ample opportunity to liquidate undercollateralized RWA positions.