Disable code coverage report for macOS.
Disable code coverage report for macOS.

Does not work in macOS builds for now.  Initially this was broken 13 days ago
[1] on scheduled build.  I suspect this is related to php-action update but
have no time to check this right now.  Thus I decided to leave code coverage
report only for Linux at this time.

/cc @ruudboon @AlexNDRmac

[1]: https://github.com/phalcon/php-zephir-parser/actions/runs/42334154

phalcon/php-zephir-parser,phalcon/php-zephir-parser,phalcon/php-zephir-parser,phalcon/php-zephir-parser,phalcon/php-zephir-parser