Cohort namesake images

[PrishalM]

User Story:
As a viewer of cohorts.futureproof.co.uk
I want to see an image of the namesake on each cohort directory page
So that I get some context of the person and/or idea of the cohort namesake

Acceptance criteria:

• on each cohorts page, a visible non-defaulted image of the cohort namesake

Current investigation:
Out of the 18 cohorts:

• 16 namesake images load non-defaulted images
• Gebru & Wilkes defaulted to the futureproof icon as a result of a 403 Forbidden status.
  • Both have Public images in their respective roster.json files, but possibly not uploaded?
• Al-Jazari is the only cohort that does not use the standard of a portrait of the cohort namesake