Fix the rest api special characters

[imranhsayed]

Description
get_the_title( $post->ID ) retrieves the post title.
wp_kses_decode_entities() will decode any HTML entities (like & → &) in the title.
This change will ensure that any special characters in the title, like &, are properly decoded before being returned in the REST API response.
Now, the title.rendered field in the REST API response will return the decoded title with the correct characters like &, instead of the Unicode entities.

Trac ticket: https://core.trac.wordpress.org/ticket/53860

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[github-actions]

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