Update README.md

Author: alesanchezr

README.md

@@ -27,6 +27,7 @@ Hi! I'm [Alejandro Sanchez @alesanchezr](https://github.com/alesanchezr), really
 
 5. Learn the most popular CSS Tricks.
 
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 #### Before we start... other related tutorials
 
 <ol>
@@ -38,6 +39,7 @@ Hi! I'm [Alejandro Sanchez @alesanchezr](https://github.com/alesanchezr), really
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 Complete selection of autograded CSS exercises, anyone interested in learning CSS!
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 ## One click installation: