Docs: Add a `@staticvar` entry for `$transports` in `WP_Http::_dispatch_request()`.

Props utsav72640.
Fixes #48774.

git-svn-id: https://develop.svn.wordpress.org/trunk@47346 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-http.php

@@ -560,6 +560,8 @@ class WP_Http {
 	 * @deprecated 5.1.0 Use WP_Http::request()
 	 * @see WP_Http::request()
 	 *
+	 * @staticvar array $transports
+	 *
 	 * @param string $url URL to Request.
 	 * @param array $args Request arguments.
 	 * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'.