Docs: Update `@since` for `populate_network_meta()`.

Fixes #44895.


Built from https://develop.svn.wordpress.org/trunk@44449


git-svn-id: http://core.svn.wordpress.org/trunk@44280 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/schema.php

@@ -1121,7 +1121,7 @@ function populate_network( $network_id = 1, $domain = '', $email = '', $site_nam
 /**
  * Creates WordPress network meta and sets the default values.
  *
- * @since 5.0.0
+ * @since 5.1.0
  *
  * @global wpdb $wpdb          WordPress database abstraction object.
  * @global int  $wp_db_version WordPress database version.

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44448';
+$wp_version = '5.1-alpha-44449';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.