Count 123

Fixes: bitfield indices had 3 twice

README.md

@@ -35,7 +35,7 @@ Suppose we want to store multiple data inside a single Byte, as shown below:
     <td>5</td>
     <td>4</td>
     <td>3</td>
-    <td>3</td>
+    <td>2</td>
     <td>1</td>
     <td>0</td>
   </tr>