minor #30587 [Intl] Fix test (ro0NL)

This PR was merged into the 3.4 branch.

Discussion
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[Intl] Fix test

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | yes/no <!-- don't forget to update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | #...   <!-- #-prefixed issue number(s), if any -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Creates some weird path, that breaks the next tests.

Commits
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226f522 [Intl] Fix test

src/Symfony/Component/Intl/Tests/Util/GitRepositoryTest.php

@@ -45,7 +45,7 @@ public function testItThrowsAnExceptionIfInitialisedWithNonGitDirectory()
             $this->setExpectedException(RuntimeException::class);
         }
 
-        @mkdir($this->targetDir, '0777', true);
+        @mkdir($this->targetDir, 0777, true);
 
         new GitRepository($this->targetDir);
     }