This is not legal advice but I do have some experience with sample banks. In the absence of more information, I would approach the exported samples as if you were using them from Sonuscore directly. The license for that is here:

https://sonuscore.com/guests/manuals/Free_Orchestra_Chords_M...

If you read that license, you'll notice that the featured website does not appear to really comply with the license of the samples they're using. Like most sample banks licences, it specifically disallows redistributing the raw samples. That is, unless they got a special license.