chore: update readme to clarify dynamic prop dependencies

[kevinb-tryjeeves]

📝 Changes

Update README to clarify the dynamic prop dependencies.

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Prop	Description	Type	Required?	Default
acceptanceLanguage	Override the acceptance language specified in the Ironclad Clickwrap App's UI. To use this prop, the dynamic prop must be set to true	string	No	Value specified in Ironclad Clickwrap Group's UI
renderData	Object containing the dynamic render data for your contract. To use this prop, the dynamic prop must be set to true. For more information on using dynamic contracts, check out this documentation.	object	If dynamic is set to true	undefined