Migrate BAT rewards to Polygon

[Canonthunder]

@Change rewards wallet to Brave wallet

Note that once you receive BAT into your custodial account, you can always withdraw it on-chain to your Brave Wallet.

The fee to do this is the problem… withdraws from Gemini to either Brave wallet or Metamask would have cost me about 6 months of collecting BAT tokens to make this move had I continued.