Update techniques/html/H4.html

Author: patrickhlauke

techniques/html/H4.html

@@ -14,7 +14,7 @@
             the content without following the order of the interactive elements in the code. In
             these cases, an alternative order can be specified using the <code>tabindex</code>
             attribute of the interactive element. The <code>tabindex</code> is given a value between
-            0 and 32767. </p>
+            <code>0</code> and <code>32767</code>. </p>
       <p>When the interactive elements are navigated using the tab key, the elements are given
             focus in increasing order of the value of their <code>tabindex</code> attribute.
             Elements that have a <code>tabindex</code> value higher than zero will receive focus