Font different in Editing window and final publication

Hi,
When I hit preview the Times new Roman looking font in my edit window turns into one looking like Arial.

This is the screenshot of the edit window.

https://www.diigo.com/item/image/1ndkp/73sj

This is the final Link

https://hariiyer.com/blog-posts/my-journey-to-australia-hari-iyer/