Update the Windows explorer tip to be less confusing

Thanks @EskeRahn

Close editorconfig/editorconfig#458

Author: xuhdev

index.html

@@ -67,7 +67,7 @@ <h3>Where are these files stored?</h3>
 
     <p>EditorConfig files are read top to bottom and the most recent rules found take precedence.  Properties from matching EditorConfig sections are applied in the order they were read, so properties in closer files take precedence.</p>
 
-    <p><strong>For Windows Users:</strong> To create an <code>.editorconfig</code> file within Windows Explorer, you need to create a file named <code>.editorconfig.</code>, which Windows Explorer will automatically rename to <code>.editorconfig</code>.</p>
+    <p><strong>For Windows Users:</strong> To create an <code>.editorconfig</code> file within Windows Explorer, you need to create a file named <code>.editorconfig.</code> (note the trailing dot), which Windows Explorer will automatically rename to <code>.editorconfig</code> for you.</p>
   </section>
 
   <section id="file-format-details">