wxGUI: add <h2> to components manual page

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@59804 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/docs/wxGUI.components.html

@@ -1,6 +1,8 @@
 <!-- meta page description: wxGUI Components -->
 <!-- meta page index: wxGUI -->
 
+<h2>wxGUI Components</h2>
+
 List of available <em><a href="wxGUI.html">wxGUI</a></em> components:
 
 <ul>