[php-src] Issue #11544: finfo_file returns wrong mime type for csv file

Issue: https://github.com/php/php-src/issues/11544 Author: oleg-andreyev ### Description **This issue is for the sake of awareness!** upstream issue https://bugs.astron.com/view.php?id=463 ---- The following code: ```php <?php $path = __DIR__ . '/test.csv'; $finfo = finfo_file(finfo_open(FILEINFO_NONE), $path); var_dump($finfo); $path = __DIR__ . '/test2.csv'; $finfo = finfo_file(finfo_open(FILEINFO_NONE), $path); var_dump($finfo); ``` Resulted in this output: ``` ❯ php test.php string(10) "ASCII text" string(8) "CSV text" ``` But I expected this output instead: ``` ❯ php test.php string(8) "CSV text" string(8) "CSV text" ``` [test.csv](https://github.com/php/php-src/files/11875038/test.csv) [test2.csv](https://github.com/php/php-src/files/11875039/test2.csv) ### PHP Version 8.2.6 ### Operating System _No response_