Update Jobs page styling

[AnthonyRollins]

Segacy has updated the styling for the jobs page. You can find the styling in Figma.

Let me know what other info you need.

[thekaveman]

Split out the Jobs page (this issue) and Job Post pages #83.

[angela-tran]

I started work on this in #87, but forgot to assign myself to this issue - sorry about that!