Themes: Increase HTTP timeout for Theme API requests.

This changeset modifies the HTTP request in `themes_api()` to use the same HTTP request timeout as in `plugins_api()`, which is 15 seconds, instead of a default value of 5 seconds.

Props ahortin, peterwilsoncc, dd32, costdev.
Fixes #57315.

Built from https://develop.svn.wordpress.org/trunk@55188


git-svn-id: http://core.svn.wordpress.org/trunk@54721 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/theme.php

@@ -555,6 +555,7 @@ function themes_api( $action, $args = array() ) {
 		}
 
 		$http_args = array(
+			'timeout'    => 15,
 			'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
 		);
 		$request   = wp_remote_get( $url, $http_args );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55187';
+$wp_version = '6.2-alpha-55188';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.