Replace `sanitize_text_field` with `sanitize_email`

[hellosatya]

Patch - ​https://github.com/WordPress/wordpress-develop/compare/trunk...askhellosatya:wordpress-develop:patch-1

The current code segment, last updated 9 years ago by @boone, utilizes sanitize_text_field to handle email input:

if ( isset( $_POST['email'] ) ) {
    $user->user_email = sanitize_text_field( wp_unslash( $_POST['email'] ) );
}

For enhanced security and precision, it's recommended to update it as follows, utilizing sanitize_email specifically for email inputs:

if ( isset( $_POST['email'] ) ) {
    $user->user_email = sanitize_email( wp_unslash( $_POST['email'] ) );
}

This change ensures the proper sanitization of the email input, promoting better code practices and improved data handling.

[sabernhardt]

Hi and welcome to WordPress Core Trac!

The sanitize_email() function is already a part of the patch on #45714, so I'll close as a duplicate. If you would like to add anything to the conversation, please comment there.