Increase MaxValidators value

MaxValidators=125 to MaxValidators=150 / This proposal will increase the number of active validator to 150 in the Cosmos Hub. The last update was done in 2019, and it was already mentioned that the network could easily assume 180 active seats. With the many progress done on the Cosmos ecosystem, we proprose to add 25 seats on the main chain. A lot of new validators are building on the ecosystem but not Cosmos hub directly as they cannot afford to join the main Cosmos chain to have an active seat. We believe at StakeLab that every builder on the cosmos network should be able to provide an active validating service. You can look at details on forum Governance discussions and share your opinion: https://forum.cosmos.network/t/proposal-draft-increase-max-validator-set-size-to-150/4958