Update README.md

Author: ss892714028

README.md

@@ -18,7 +18,7 @@ Breadth First Search is unweighted and guarantee a optimal path.
 Depth First Search is unweighted and does not guarantee a optimal path.
 ![](https://github.com/ss892714028/Maze-PathFinder-Visualization-Python/blob/master/gifs/dfs-nonoptimal.gif)
 
-### A star (A*)
+### Astar (A*)
 A* is weighted and guarantee a optimal path.
 ![](https://github.com/ss892714028/Maze-PathFinder-Visualization-Python/blob/master/gifs/astar.gif)