Update proposal voting time to 2000

src/constants.cairo

@@ -1,6 +1,6 @@
 const NEW_PROPOSAL_QUORUM: u128 =
     200; // 1/200 of totalSupply required to propose an upgrade. Quorums don't take into account investors. at all, they don't count into total eligible voters, but do vote
-const PROPOSAL_VOTING_TIME_BLOCKS: u64 = 1500;
+const PROPOSAL_VOTING_TIME_BLOCKS: u64 = 2000;
 const QUORUM: u128 = 10; // 1/10 of totalSupply required to participate to pass
 const MINUS_ONE: felt252 = 0x800000000000011000000000000000000000000000000000000000000000000;
 const TEAM_TOKEN_BALANCE: u128 = 1000000000000000000;