Fix typo in JS basics: variables and operators

foundations/javascript_basics/variables_and_operators.md

@@ -67,7 +67,7 @@ These are the building blocks of any program, you can think of variables as "sto
 
 ![Variable Box Illustration](https://cdn.statically.io/gh/TheOdinProject/curriculum/d39eaf2ca95e80705f703bb218216c10508f5047/foundations/javascript_basics/fundamentals-1/imgs/00.png)
 
-You can declare variables using the `let` keyword. Lets try it! (No pun intended).
+You can declare variables using the `let` keyword. Let's try it! (No pun intended).
 
 ```javascript
 let name = "John";