Fixed typo in README

Author: 7thSamurai

README.md

@@ -17,7 +17,7 @@ a binary tree, with each leaf node containing a convex polygon. While this may s
 hardware of the era, it could take several minutes to do all the calculations just for a single map!
 
 This resulted in a *huge* boost in the rendering performance, which in turn allowed **DOOM** to have some of the most revolutionary graphics and game-play
-of its era, which is one of the contributing factors which helped made it one of the most iconic games of all time!
+of its era, which is one of the contributing factors which helped to make it one of the most iconic games of all time!
 
 I made this software as a fun proof of concept to honor one of my favorite video games. The algorithms employed are almost identical to the ones in
 ID software's original preprocessing utility, so the data generated by this program is nowhere near on par with other more modern tools. Because of this, I