fix(doc): vague verification description on MakerFeeRate and TakerFeeRate

[chen4903]

Principal

In general, we encourage the maker as he provides the liquidity, and "discourage" the taker as he takes away the liquidity. So the fee of maker should be less than taker.

Not clear description

But in spec ,the description is not clear: it should be False❌ in this context

// https://github.com/InjectiveFoundation/injective-core/blob/release/v1.18.x/injective-chain/modules/exchange/spec/04_state_transitions.md?plain=1#L408
- Validate `MakerFeeRate` is bigger than `TakerFeeRate`

In the code, it is:

// https://github.com/InjectiveFoundation/injective-core/blob/release/v1.18.x/injective-chain/modules/exchange/types/v2/proposal.go#L445-L449
	if p.MakerFeeRate != nil && p.TakerFeeRate != nil {
		if p.MakerFeeRate.GT(*p.TakerFeeRate) {
			return types.ErrFeeRatesRelation
		}
	}

Other description

Let's look at another description: it should be True✅ in this context

// https://github.com/InjectiveFoundation/injective-core/blob/release/v1.18.x/injective-chain/modules/exchange/spec/04_state_transitions.md?plain=1#L409
- Validate `InitialMarginRatio` is bigger than `MaintenanceMarginRatio`.

In the code, it is:

https://github.com/InjectiveFoundation/injective-core/blob/release/v1.18.x/injective-chain/modules/exchange/types/v2/msgs.go#L705-L707
	if msg.InitialMarginRatio.LTE(msg.MaintenanceMarginRatio) {
		return types.ErrMarginsRelation
	}

Summary

In the spec, similar descriptions like "Validate xxx is xxx than xxx" are used, but their semantics are not unified; sometimes they require True, and sometimes False. This makes it confusing for readers to understand the spec. Therefore, I modified it to make it clearer.