test_save unit test disabled because of bug in Zivid SDK 1.8.1

[nedrebo]

This bug is planned to be fixed in next version of the SDK. Re-enable this test once the fix is in place.

Commit 4eb4a8e should be reverted:

zivid-python/test/test_frame.py

Line 49 in 4eb4a8e

@pytest.mark.skip(reason="https://github.com/zivid/zivid-python/issues/54")