Update 03.md (epicweb-dev#275)

Made a couple of links clickable

Author: sunnatganiev

src/exercise/03.md

@@ -72,7 +72,7 @@ const element = <div className="hmmm">how do I make this work?</div>
 ```
 
 📜 The react docs for JSX are pretty good:
-https://reactjs.org/docs/introducing-jsx.html
+[https://reactjs.org/docs/introducing-jsx.html](https://reactjs.org/docs/introducing-jsx.html)
 
 Here are a few sections of particular interest for this extra credit:
 
@@ -106,7 +106,7 @@ const element = React.createElement('div', {...props})
 
 See if you can figure out how to make that work with JSX.
 
-📜 https://reactjs.org/docs/jsx-in-depth.html#spread-attributes
+📜 [https://reactjs.org/docs/jsx-in-depth.html#spread-attributes](https://reactjs.org/docs/jsx-in-depth.html#spread-attributes)
 
 ## 🦉 Feedback