Add flaky decorator to test_open_dataset_kerchunk - fetching s3 resources - not sure why it's failing from CI

Author: charles-turner-1

tests/test_source.py

@@ -72,6 +72,7 @@ def test_get_xarray_open_kwargs(storage_options):
     assert xarray_open_kwargs['backend_kwargs']['storage_options'] == storage_options
 
 
+@pytest.mark.flaky(max_runs=3, min_passes=1)  # Cold start related failures
 def test_open_dataset_kerchunk(kerchunk_file=kerchunk_file):
     xarray_open_kwargs = _get_xarray_open_kwargs(
         'reference',