Docs: Remove a reference to WordPress 2.7 from `readme.html`.

Props afercia, donmhico.
Fixes #47963.
Built from https://develop.svn.wordpress.org/trunk@47056


git-svn-id: http://core.svn.wordpress.org/trunk@46856 1a063a9b-81f0-0310-95a4-ce76da25c4cd

readme.html

@@ -33,7 +33,6 @@
 
 <h2>Updating</h2>
 <h3>Using the Automatic Updater</h3>
-<p>If you are updating from version 2.7 or higher, you can use the automatic updater:</p>
 <ol>
 	<li>Open <span class="file"><a href="wp-admin/update-core.php">wp-admin/update-core.php</a></span> in your browser and follow the instructions.</li>
 	<li>You wanted more, perhaps? That&#8217;s it!</li>

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47055';
+$wp_version = '5.4-alpha-47056';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.