Raise peg to USD 167.66

Several YAM harvesters and investors suffered significant losses following a disclosure from the developer team of a bug; as a result the price dropped from an all time high of 167.66$ to 11$, to then tumble to 1$ and below. Since this sudden drop was caused not by the intrinsic rebase mechanisms but rather by developers' mistake, it would seem fair to either raise the peg to $167.66 or, since 10.33 YAM v1 could only generate 1 YAM v2, $167.66*10.33 = $1731.9278.