Update worker.mdoc

[Corbi84]

Edited the level 0 tool description from Wood or Gold to Stone, as per message https://discord.com/channels/139070364159311872/1284909613401247785/1290077429687255051

Cheers,
Corbi

Closes #

Changes proposed:

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[Thodor12]

Hey, thanks for your contribution.

Please sign the CLA so this may be merged.