Space between testimonials

All,
I didn’t see a way to search for the problem I am having, so I will ask and if you can point me to the answer, then I would be grateful for any help.

I have this plugin at this site: https://www.thegpscoach.com/testimonials/

There is too much space in between each testimonial.

Can someone please tell where I can modify code to correct this issue?

Thanks for any help in advance.

https://www.ads-software.com/plugins/testimonials-widget/