Carreers Accessibility Improvements

[GeorgeBellTMH]

• [x] Buttons don't have accessible name
• [x] Image elements need alt text

[lucastbelem]

@GeorgeBellTMH can you please add Aidan to this repo so we can assign work to him? Please assign this task to Aidan.

[RAidanM]

764 All image elements now have alt text