PHPDoc correction for edit_bookmark_link in wp-includes/link-template.php

[atachibana]

Enhanced missing information of Codex for edit_bookmark_link() in wp-includes/link-template.php.
When $link is '', default value 'Edit This' is set in the function body.

- * @param string $link     Optional. Anchor text. Default empty.
+ * @param string $link     Optional. Anchor text. If empty, default is 'Edit This'. Default empty.

Codex: ​https://codex.wordpress.org/Function_Reference/edit_bookmark_link
Code Reference: ​https://developer.wordpress.org/reference/functions/edit_bookmark_link/

Above description was taken from edit_comment_link() in the same function.

This is the action of inline docs and Codex migration initiatives.

[SergeyBiryukov]

In 46383:

Docs: Clarify default value for the $link parameter in edit_tag_link(), edit_term_link(), and edit_bookmark_link().

Props atachibana.
Fixes #48109.