Updated a sentence in History of ML page

[JDhruv14]

In the 'History of Machine Learning Page', under the title of 'Notable discoveries', the first sentence is "1763, 1812 and its predecessors. This theorem and its applications underlie inference, describing the probability of an event occurring based on prior knowledge." which is kind of confusing so I suggest the sentence should be like "Bayes' Theorem, first published in 1763 and later refined by Pierre-Simon Laplace in 1812, underlies statistical inference by describing how to update the probability of an event based on prior knowledge and new evidence." which is more precise.