PHP 8.1: Ensure PHPCS doesn't warn on the now harmless ini_set

[philipjohn]

Description of the Change

While #327 resolved a deprecation warning, the code is still flagged by PHPCS as being problematic. This change builds on #327 to add the phpcs:ignore statement so that the code doesn't hold up any processes unnecessarily by flagging something that's no longer an issue.

Closes #283

How to test the Change

1. Run PHPCS using PHP 8.1 (e.g. with <config name="testVersion" value="8.1" /> in phpcs.xml)
2. Observe that PHPCS produces a warning for inc/functions.php:415
3. Apply this patch and re-run PHPCS, there will be no warning

Changelog Entry

Added - phpcs:ignore on the now safe ini_set()

Credits

Props @philipjohn

Checklist:

• [x] I agree to follow this project's Code of Conduct.
• [x] I have updated the documentation accordingly.
• [x] I have added tests to cover my change.
• [x] All new and existing tests pass.

[philipjohn]

@ravinderk Are you referring to the "Silencing errors..." warning? If so, that's not the PHPCS issue this PR is addressing.

Without this PR, PHP 8.2 compatibility checks with PHPCS report the following:

FILE: safe-redirect-manager/inc/functions.php
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 336 | WARNING | INI directive 'auto_detect_line_endings' is deprecated since PHP 8.1
     |         | (PHPCompatibility.IniDirectives.RemovedIniDirectives.auto_detect_line_endingsDeprecated)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

After this change, that deprecation warning is gone.