testimonials grid section using HTML and CSS

I don't know why when I look at the live site, everything is as it should be, but the screenshot generated by frontendmentor for some reason shows text overflow on the far right div????

my best attempt using css grids to do the testimonials grid section challenge. I need help on how to adjust font size to be responsive to div size. I had to manually adjust the font size to fit into the container that had a fixed size and I feel like there is a better solution.