Prop 4838: Increase Minimum Deposit Amount for Terra Governance to 5000 LUNA

This proposal seeks to increase the minimum deposit amount required to submit a governance proposal on the Terra chain from 512 $LUNA to 5000 $LUNA to deter spam. Forum post: https://common.xyz/terra/discussion/1269612-increase-minimum-deposit-amount-for-terra-governance-to-5000-luna