Update why-webpack.md (#2630)

Author: Stef733

src/content/concepts/why-webpack.md

@@ -8,7 +8,7 @@ contributors:
 - EugeneHlushko
 ---
 
-To understand why you should use webpack lets do a recap of how we use JavaScript on the web before bundlers were a thing.
+To understand why you should use webpack let's do a recap of how we use JavaScript on the web before bundlers were a thing.
 
 There are two ways to run JavaScript in a browser. First, include a script for each functionality you want to implement, the issue is that the solution is hard to scale as loading too many scripts causes a network bottleneck. The other alternative is to load a big .js file containing all your project code, but this results in an unmaintainable scripts that causes problems in scope, size, readability, fragility and monolith files.