add "Learning from biased decisions" section

[doubleiis02]

content is in figma

[RahulKhanna14]

Add a new frame/box for this in the College App case study section. Here is an image of the content:

IMPORTANT: DONT INCLUDE THE GRAPH YET. We will be implementing that separately - for now, you can just put a placeholder.

As noted above, the content is also in the Figma (found on our Slack channel). You should be able to directly copy/paste text from the Figma. Refer to other pages in getting the styling, etc. right as well as the post/reflection question, etc.