fix: flappy snapshot

[pauldambra]

these data flapshots are snapping

i guess it's new conditions or hogql changed

we tend not to replace dates in these snapshot tests i guess because we want to see that filters are working

so i've tried to scope this to just these new flappy snapshots

(i didn't want to figure out if I could freeze time in the tests instead)

[pauldambra]

@aspicer I'll get this in to try and save on the "build minutes waited for by engineers" metric 🤣

but it has changed quite a few snapshots... it might be better to freeze time in the original flapping cohort tests than have the snapshots set here

so feel free to revert this if there is a better fix :)

[pauldambra]

assuming it stops updating snapshots before you offer a different fix 🤣