docs: add documentation on default accept list in stargate wasm querier

[damiannolan]

Description

Adding docs for default accept list in stargate wasm querier.

Let me know if this needs to be replicated in any versioned docs. I thought not at the moment.

closes: #5846

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[crodriguezvega]

Thank you, @damiannolan!

Let me know if this needs to be replicated in any versioned docs. I thought not at the moment.

Correct, no need!

[chatton]

LGTM 💪