Add aMATIC as collateral type for Haunt 2 gotchis

As Aave deployed a market into the Polygon blockchain, we now have to opportunity to create gotchis with non-bridged aTokens.

With the upcoming Haunt2, there's an opportunity to onboard a new kind of collateral with the MATIC asset. As no Haunt1 Aavegotchis will have this kind of collateral, it'll make interesting Aavegotchis to haunt for even for Haunt1 players.