[Dashboard] chore: add spacing for TUrnstile captcha (#5182)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR focuses on enhancing the styling of the `Turnstile` component within the `FaucetButton.tsx` file by adding a margin-top class.

### Detailed summary
- Added the `className="mt-4"` to the `Turnstile` component in `FaucetButton.tsx` to apply a top margin for improved spacing.

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Author: kien-ngo

apps/dashboard/src/app/(dashboard)/(chain)/[chain_id]/(chainPage)/components/client/FaucetButton.tsx

@@ -208,6 +208,7 @@ export function FaucetButton({
               <FormItem>
                 <FormControl>
                   <Turnstile
+                    className="mt-4"
                     siteKey={TURNSTILE_SITE_KEY}
                     onSuccess={(token) => field.onChange(token)}
                   />