past events issues

[Waterdrips]

• Day1 schedule not exported for the 2023-06 event (need to pick an older commit by a day or so before i commented it our)
• a refresh on the 2023-06 pages for speakers that work don't load, because the pages are not speaker_name.html, but just speaker_name - they do load the first time though (like https://conf.techmids.io/past/2023-06/speakers/lin-sun but it wont load from here)

[stuartlangridge]

This requires the static build to generate all the speaker pages at build time. I think this involves adding getStaticPaths to the Speaker component, which should read speakers.js, but I haven't fully worked this out yet. (Anyone who knows nextjs more intimately would probably understand this easily enough if they want to jump in!)

[Waterdrips]

this was implemented (getStaticPaths/Props) in main, https://github.com/techmids/conf.techmids.io/blob/main/src/pages/speakers/%5Bspeaker%5D.jsx#L40

not sure how we could back-port