align text with image on hugo site

i'm using axiom theme on a Hugo site: https://l1ge.github.io/leviathan2/ Unlike in the theme example, I have a smaller image at the top of my post, its a jpeg i resized myself. Because of that, the caption isn't align with the image and i don't find a way to make it align. The source code of my blog is here

Can someone help me to fin a way? thanks