fix: formcontrol button text

Author: Rajat Chaudhary

example/storybook-nativewind/src/components/FormControl/index.nw.stories.mdx

@@ -780,7 +780,7 @@ Form Action Buttons can also be utilized in conjunction with FormControl.
           </FormControl>
                <FormControl>
             <Button action='negative' className='ml-4'>
-              <ButtonText>
+              <ButtonText className="text-white">
                 Delete
               </ButtonText>
             </Button>