Multisite: Update docs for `switch_to_blog()`.

As of [21403], autoload options are switched along with the cache key prefix.

Props stevepuddick.
Fixes #41815.


git-svn-id: https://develop.svn.wordpress.org/trunk@41373 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/ms-blogs.php

@@ -775,7 +775,6 @@ function update_blog_option( $id, $option, $value, $deprecated = null ) {
  * from other blogs. You can switch back afterwards using restore_current_blog().
  *
  * Things that aren't switched:
- *  - autoloaded options. See #14992
  *  - plugins. See #14941
  *
  * @see restore_current_blog()