Fix incorrect useQueryParam setter example in use-page-state-readability.md

[suinkimme]

📝 Key Changes

The example in use-page-state-readability.md incorrectly passed an object to the useQueryParam setter:

_setCardId({ cardId }, "replaceIn");

This PR updates the example to use the correct usage:

_setCardId(cardId, "replaceIn");

This fixes misleading documentation and aligns the example with the expected API of useQueryParam.

🖼️ Before and After Comparison

Before	After
_setCardId({ cardId }, "replaceIn");	_setCardId(cardId, "replaceIn");

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