Fixed typo

Author: Rgada28

README.md

@@ -14,7 +14,7 @@ If you'd help us making the correction, you can open a pull request with your pr
 
 ## Development environment
 
-Below are instructions on how to setup a development environment on your own machine. These instructions are only relevant to you if you wish to chage how the course's website works or looks like. If you don't know how to program or only wish to contribute to the content of the course, please skip this section.
+Below are instructions on how to setup a development environment on your own machine. These instructions are only relevant to you if you wish to change how the course's website works or looks like. If you don't know how to program or only wish to contribute to the content of the course, please skip this section.
 
 Requirements: recent Node