Add prizes inside active challenge

[KatunaNorbert]

Fixes #592.

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Name	Status	Preview	Comments	Updated (UTC)
df-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 19, 2023 3:17am

[idiom-bytes]

Looks great but deadline date is wrong.

It should be "Enter Before Aug 03", or "Deadline Aug 02 @ 23:59GMT"

[KatunaNorbert]

I updated the date, I think that was the issue not the text