Add some missing credits
Based on patch by: Nescio Differential Revision: D2882
Some probably should have been added in rP23182, for some others times changed.
Justified by https://wildfiregames.com/forum/topic/27286-committed-siege-artillery-rework/page/2/?tab=comments#comment-389188 rP23285
Justified by comments in https://wildfiregames.com/forum/topic/27156-artillery-towers/ rP23094
Justified by https://wildfiregames.com/forum/topic/17357-task-hippo/page/2/?tab=comments#comment-394874
rP23603