style: use dotprop

Author: drainpixie

website/help.html

@@ -101,13 +101,7 @@ <h2>Configuration</h2>
       </p>
 
       <pre><code>{
-    <span class="blue">"checks"</span>: {
-        <span class="blue">"typography"</span>: {
-            <span class="blue">"symbols"</span>: {
-                <span class="blue">"curly_quotes"</span>: <span class="red">false</span>
-            }
-        }
-    }
+    <span class="blue">"checks.typography.symbols.curly_quotes"</span>: <span class="red">false</span>
 }</code></pre>
     </main>