TableDiff: Deprecated function mb_convert_encoding() in PHP 8.2

[kbasarab]

I'm still getting this but for TableDiff:

Deprecated function: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in Caxy\HtmlDiff\Table\TableDiff->createDocumentWithHtml() (line 630 of /var/www/html/vendor/caxy/php-htmldiff/lib/Caxy/HtmlDiff/Table/TableDiff.php).

Originally posted by @Ambient-Impact in #120 (comment)