Master Branch update inc/php_upgrade.inc typo

update inc/php_upgrade.inc typo

- https://community.centminmod.com/threads/php-7-0-25-php-7-1-11-cve-security-update-available.13145/#post-55900

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Centmin Mod Github Master branch

Master branch is where most recent commits are made as at May 24, 2015.

• Branch: https://github.com/centminmod/centminmod
• Commit History: https://github.com/centminmod/centminmod/commits/master

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