fix test src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php

src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php

| Q             | A
| ------------- | ---
| Bug fix?      | [no]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | []
| License       | MIT
| Doc PR        | []

When running the tests in the HTTPFoundation package these failed. I felt like fixen these so I can start working with all tests green in the package.
wrong indentation