Increment version of ltd_url_ingest schema to v2

Since the DocumentSourceType enum changed, we need new schemas.

src/ook/domain/kafka.py

@@ -91,4 +91,4 @@ class Meta:
         """Metadata for the model."""
 
         namespace = "lsst.square-events.ook"
-        schema_name = "ltd_url_ingest_v1"
+        schema_name = "ltd_url_ingest_v2"