Apparently the bottles had wax seals so it is possible that some are still good. Also, check out this article about storing wine at the bottom of the sea.
https://www.rt.com/russia/472632-cognac-russian-tsar-recovered/
Port Royal Jamaica sunk in 1692. Some sealed bottles of wine/rum (I forget which) were recovered about 30 years ago. All of them contained sea water with no trace of the original contents remaining. That was much longer than the 100 years here, but I suspect that there will be significant see water infusion over the course of 100 years no matter how they’re sealed.