Update README.md

README.md

 ## 3) Square Numbers
 In the class **Numbers**, complete the method called **squares()** so that it returns a string of the square numbers up to 100. The Unit Test is not provided for you, you must complete it.
 
-        ### Example<br>
+### Example<br>
 1: squares()<br>
 2: *** Output *** <br>
 3: 1<br>