It is not likely that these bones are those of John the Baptist. The veneration of saints and relics did not occur until later centuries. I believe the story said something like 5th century church.
Even if they are authentic they are of no significance.
What is of significance is what John did and was recorded in the Bible.
John 3:17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.