Docs: Typo in `wp_print_scripts` reference to `WP_Scripts::do_item()`

[peterwilsoncc]

The @see tag in the wp_print_scripts() function currently references WP_Scripts::do_items(). The plural is in fact the singular, WP_Scripts::do_item().

Placing on the 5.3 milestone as this is a documentation only change.

[peterwilsoncc]

In 46311:

Docs: Fix typo in wp_print_scripts()' reference to WP_Scripts::do_item().

Fixes #48141.

[johnbillion]

@peterwilsoncc For future reference, these sort of documentation typos can be fixed as part of the docblocks improvement ticket that we have for each milestone. For 5.3 it's #47110.