tests: Update test to expect lowercase resource format

Author: bellisk

ckanext/dcatapchharvest/tests/test_dcatap_ch_parse.py

@@ -338,7 +338,7 @@ def test_distribution_format_format_only(self):
 
         resource = datasets[0]["resources"][0]
 
-        assert resource["format"] == "CSV"
+        assert resource["format"] == "csv"
 
     def test_temporals_accepted_formats(self):
         contents = self._get_file_contents("dataset-datetimes.xml")