Fix tests on Windows

[8ctopus]

the PR fixes:

$ vendor/bin/phpunit
Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9000 (through xdebug.client_host/xdebug
.client_port).
PHPUnit 9.6.19 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.0
Configuration: K:\dev\github\php-nimbly-capsule\phpunit.xml

F..............................................................  63 / 178 ( 35%)
............................................................... 126 / 178 ( 70%)
....................................................            178 / 178 (100%)

Time: 00:00.150, Memory: 4.00 MB

There was 1 failure:

1) Nimbly\Capsule\Tests\UploadedFileTest::test_move_to_unwriteable_target_throws_runtime_exception
Failed asserting that exception of type "RuntimeException" is thrown.

FAILURES!
Tests: 178, Assertions: 262, Failures: 1.