Make T-shirt color radio buttons required

Updated radio button inputs to be required for color selection.

Author: Zadri415

Form-Controls/index.html

@@ -31,19 +31,19 @@ <h1>Product Pick</h1>
           <legend>Choose a T-shirt Color:</legend>
 
           <label>
-            <input type="radio" name="color" value="red">
+            <input type="radio" name="color" value="red" required>
             Red
           </label>
 
 
           <label>
-            <input type="radio" name="color" value="blue">
+            <input type="radio" name="color" value="blue" required>
             Blue
           </label>
 
 
           <label>
-            <input type="radio" name="color" value="green">
+            <input type="radio" name="color" value="green" required>
             Green
           </label>