Update template annotations

site/templates/note.php

@@ -3,6 +3,8 @@
  * Templates render the content of your pages. 
  * They contain the markup together with some control structures like loops or if-statements.
  * This template is responsible for rendering all the subpages of the `notes` page.
+ * The `$page` variable always refers to the currently active page. 
+ * To fetch the content from each field we call the field name as a method on the `$page` object, e.g. `$page->title()`.
  * Snippets like the header and footer contain markup used in multiple templates. They also help to keep templates clean.
  * More about templates: https://getkirby.com/docs/guide/templates/basics
  */