Dashboard: Show 2 w.org news items to preserve clustered posts.

These days there are often 2 posts published close to each other, like a release announcement and a Month In WordPress post. When that happens, the earlier post is often pushed out of the widget before many people have had a chance to see it.

Ideally, the number of total items would remain at `4`, to reduce visual clutter. Implementing a conditional item would require a significant refactor, though. Increasing the total number of items to `5` is a practical compromise.

Props hlashbrooke, tellyworth.
Fixes #43441.

Built from https://develop.svn.wordpress.org/trunk@49114


git-svn-id: http://core.svn.wordpress.org/trunk@48876 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/dashboard.php

@@ -1450,7 +1450,7 @@ function wp_dashboard_primary() {
 			 * @param string $title Title attribute for the widget's primary link.
 			 */
 			'title'        => apply_filters( 'dashboard_primary_title', __( 'WordPress Blog' ) ),
-			'items'        => 1,
+			'items'        => 2,
 			'show_summary' => 0,
 			'show_author'  => 0,
 			'show_date'    => 0,

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-49113';
+$wp_version = '5.6-alpha-49114';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.