Increase indentation for type attribute examples

The HTML Line-wrapping recommendation is to use four additional spaces when wrapping HTML, yet the “Not recommended” examples for the `type` attribute rule were using two spaces.

Author: tonyruscoe

htmlcssguide.html

@@ -356,7 +356,7 @@ <h4 id="type_Attributes">3.1.8 <code>type</code> Attributes</h4>
 
 <pre><code class="language-html prettyprint badcode">&lt;!-- Not recommended --&gt;
 &lt;link rel="stylesheet" href="https://www.google.com/css/maia.css"
-  type="text/css"&gt;
+    type="text/css"&gt;
 </code></pre>
 
 <pre><code class="language-html prettyprint">&lt;!-- Recommended --&gt;
@@ -365,7 +365,7 @@ <h4 id="type_Attributes">3.1.8 <code>type</code> Attributes</h4>
 
 <pre><code class="language-html prettyprint badcode">&lt;!-- Not recommended --&gt;
 &lt;script src="https://www.google.com/js/gweb/analytics/autotrack.js"
-  type="text/javascript"&gt;&lt;/script&gt;
+    type="text/javascript"&gt;&lt;/script&gt;
 </code></pre>
 
 <pre><code class="language-html prettyprint">&lt;!-- Recommended --&gt;