Docs: Fix some syntactical issues with the DocBlock for the `WP_Theme->update` property, introduced in [33957].

Adds an `@since`.

See #33491. See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@34236 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-theme.php

@@ -7,13 +7,15 @@
  * @since 3.4.0
  */
 final class WP_Theme implements ArrayAccess {
+
 	/**
-	 * Whether the theme has been marked as updateable
-	 *
-	 * @see WP_MS_Themes_List_Table
+	 * Whether the theme has been marked as updateable.
 	 *
+	 * @since 4.4.0
 	 * @access public
 	 * @var bool
+	 *
+	 * @see WP_MS_Themes_List_Table
 	 */
 	public $update = false;