updated quick reference text [A-Za-z]

Author: w-kuhn

index.html

@@ -115,7 +115,7 @@ <h2>Brackets:</h2>
             <td>Match any character except a, b, or c</td>
           </tr>
           <tr>
-            <td class="regex">[A-z]</td>
+            <td class="regex">[A-Za-z]</td>
             <td>Match any character from uppercase A to lowercase z</td>
           </tr>
           <tr>