Fix: icon in Apps & Features is wrong

[bdaileyumich]

use user-specified setupIcon as app icon when applicable, else fall back to electron icon

[BlackHole1]

Thank you for your contribution!

However, regarding this PR, I do not see any practical effect. Users can specify the iconUrl in options or package.json. See:

windows-installer/src/index.ts

Lines 118 to 124 in 88d5b8b

	Object.assign(metadata, {
	exe: `${appMetadata.name}.exe`,
	title: appMetadata.productName || appMetadata.name
	}, appMetadata);
	}
	Object.assign(metadata, options);

What you have modified is just a default value.

So I will close this PR, if you have any other comments, I can reopen this PR :)