[10.4.x] Update mikey179/vfsstream to v1.6.12 for PHP 8.4

Part of #3471080

next after !9378 (closed)

failure

log

---- Drupal\Tests\ckeditor5\FunctionalJavascript\ImageUrlTest ----
Status    Group      Filename          Line Function                            
--------------------------------------------------------------------------------
Fail      Other      phpunit-5.xml        0 Drupal\Tests\ckeditor5\FunctionalJa
    PHPUnit Test failed to complete; Error: PHPUnit 9.6.19 by Sebastian
    Bergmann and contributors.
    
    Testing Drupal\Tests\ckeditor5\FunctionalJavascript\ImageUrlTest
    ...........F.                                                     13 / 13
    (100%)
    
    Time: 03:57.823, Memory: 8.00 MB
    
    There was 1 failure:
    
    1) Drupal\Tests\ckeditor5\FunctionalJavascript\ImageUrlTest::testResize
    with data set "Image resize is enabled" (true)
    Failed asserting that false is identical to true.
    
    /builds/issue/drupal-3471080/vendor/phpunit/phpunit/src/Framework/Constraint/Constraint.php:122
    /builds/issue/drupal-3471080/vendor/phpunit/phpunit/src/Framework/Constraint/IsIdentical.php:80
    /builds/issue/drupal-3471080/core/modules/ckeditor5/tests/src/FunctionalJavascript/ImageTestBase.php:673
    /builds/issue/drupal-3471080/vendor/phpunit/phpunit/src/Framework/TestResult.php:729
    
    FAILURES!
    Tests: 13, Assertions: 474, Failures: 1.

closed