Replace type for props with unknown

Otherwise, you need to pass a type T to `Options` first in order to get that type in `displayNameFunc`, which is overkill.

types/storybook-addon-jsx/index.d.ts

@@ -7,7 +7,7 @@
 import '@storybook/react';
 import { ReactNode, ReactElement } from 'react';
 
-type displayNameFunc<T> = (element: ReactElement<T>) => string;
+type displayNameFunc = (element: ReactElement<any>) => string;
 
 declare module '@storybook/react' {
     interface Options {