Update and rename k_nearest_neighbours.py to k_nearest_neighbors.py

Author: LuisOfL

machine_learning/k_nearest_neighbours.py machine_learning/k_nearest_neighbors.pymachine_learning/k_nearest_neighbours.py renamed to machine_learning/k_nearest_neighbors.py

@@ -1,5 +1,5 @@
 """
-k-Nearest Neighbours (kNN) is a simple non-parametric supervised learning
+k-Nearest Neighbors (kNN) is a simple non-parametric supervised learning
 algorithm used for classification. Given some labelled training data, a given
 point is classified using its k nearest neighbours according to some distance
 metric. The most commonly occurring label among the neighbours becomes the label