chore(CI): Adjust testing matrix for Nextcloud 30 on main · nextcloud/contacts@4cb9b59

Codecov: Failed to properly create commit: The process '/home/runner/actions-runner/_work/_actions/codecov/codecov-action/e28ff129e5465c2c0dcc6f003fc735cb6ae0c673/dist/codecov' failed with exit code 1