[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

sde_collections/utils/README_PAIRED_FIELD_DESCRIPTOR.md

@@ -87,4 +87,4 @@ class DeltaUrlSerializer(serializers.ModelSerializer):
     def get_tdamm_tag(self, obj):
         tags = obj.tdamm_tag
         return tags if tags is not None else []
-```
+```