Minor fix for parliament's alliance speed ups

[Chartlux]

Hello. For some smaller alliances, even after the alliance speed ups cooldown, there are many times when not everyone will be able to accept the request, so you will not be able to make a request again. Therefore, as with troop requests, I think it would be very good to make the request available again after the cooldown. Or, I think it would be nice to have something that makes the cost increase exponentially instead of one person accepting multiple requests.