Fix bug in PHP_FPM_OVERRIDE

[baschny]

Use correct comment sign for the .conf file (; and not #). Error when starting is:

example-app-php-1  | [17-Aug-2023 14:10:01] ERROR: [/usr/local/etc/php-fpm.d/www.conf:13] value is NULL for a ZEND_INI_PARSER_ENTRY
example-app-php-1  | [17-Aug-2023 14:10:01] ERROR: Unable to include /usr/local/etc/php-fpm.d/www.conf from /usr/local/etc/php-fpm.conf at line 13
example-app-php-1  | [17-Aug-2023 14:10:01] ERROR: failed to load configuration file '/usr/local/etc/php-fpm.conf'
example-app-php-1  | [17-Aug-2023 14:10:01] ERROR: FPM initialization failed