recommended
You really should use relative urls. That way they'll work better for private repos as well.
![ScreenShot](/screenshots/latest.png)
supposing your repo has latest.png inside the screenshots folder.
~B
or right click on image from github and open image in new tab and copy url from there and past in Readme.md
e.g
![alt text](https://raw.githubusercontent.com/abdulmoizshaikh/recipe-book/master/src/assets/images/Screenshot%20from%202021-03-31%2011-08-15.png?token=AGEPYAA3FGL4MHI7LZA75VLAMQJ5A)