Update homepage testimonials

[antoinepetty]

We have some interviews from SR2022 we could use to fill new testimonials. The current ones are all SR2016 competitors

[sedders123]

Have emailed @dianedowling asking for the notes she took for this

[sedders123]

Think we have ended up with the idea that we should have three hand picked testimonials directly as a part of the homepage (like now) but a view more button that expands a section to show other testimonials. This way we can keep older testimonials while adding new ones