[fix](@svelteui/core): fix RadioGroup label type issue and make default label value as undefined for InputWrapper

Author: BeeMargarida

packages/svelteui-core/src/components/InputWrapper/InputWrapper.svelte

@@ -11,7 +11,7 @@
 		element: $$Props['element'] = undefined,
 		className: $$Props['className'] = '',
 		override: $$Props['override'] = {},
-		label: $$Props['label'] = 'label',
+		label: $$Props['label'] = undefined,
 		description: $$Props['description'] = null,
 		error: $$Props['error'] = null,
 		required: $$Props['required'] = false,

packages/svelteui-core/src/components/Radio/RadioGroup/RadioGroup.svelte

@@ -16,7 +16,7 @@
 		group: $$Props['group'] = undefined,
 		color: $$Props['color'] = undefined,
 		value: $$Props['value'] = undefined,
-		label: $$Props['label'] = null,
+		label: $$Props['label'] = undefined,
 		disabled: $$Props['disabled'] = false,
 		size: $$Props['size'] = undefined,
 		radius: $$Props['radius'] = undefined,