test: fix test_v5_v6_unknown_log_source

Author: Devdutt Shenoi

src/migration/stream_metadata_migration.rs

@@ -256,7 +256,7 @@ mod tests {
     #[test]
     fn test_v5_v6_unknown_log_source() {
         let stream_metadata = serde_json::json!({"version":"v5","schema_version":"v0","objectstore-format":"v5","created-at":"2025-03-10T14:38:29.355131524-04:00","first-event-at":"2025-03-10T14:38:29.356-04:00","owner":{"id":"admin","group":"admin"},"permissions":[{"id":"admin","group":"admin","access":["all"]}],"stats":{"lifetime_stats":{"events":3,"ingestion":70,"storage":1969},"current_stats":{"events":3,"ingestion":70,"storage":1969},"deleted_stats":{"events":0,"ingestion":0,"storage":0}},"snapshot":{"version":"v2","manifest_list":[{"manifest_path":"home/nikhilsinha/Parseable/parseable/data/test10/date=2025-03-10/manifest.json","time_lower_bound":"2025-03-10T00:00:00Z","time_upper_bound":"2025-03-10T23:59:59.999999999Z","events_ingested":3,"ingestion_size":70,"storage_size":1969}]},"hot_tier_enabled":false,"stream_type":"UserDefined","log_source":"Invalid"});
-        let expected = serde_json::json!({"version":"v6","schema_version":"v0","objectstore-format":"v6","created-at":"2025-03-10T14:38:29.355131524-04:00","first-event-at":"2025-03-10T14:38:29.356-04:00","owner":{"id":"admin","group":"admin"},"permissions":[{"id":"admin","group":"admin","access":["all"]}],"stats":{"lifetime_stats":{"events":3,"ingestion":70,"storage":1969},"current_stats":{"events":3,"ingestion":70,"storage":1969},"deleted_stats":{"events":0,"ingestion":0,"storage":0}},"snapshot":{"version":"v2","manifest_list":[{"manifest_path":"home/nikhilsinha/Parseable/parseable/data/test10/date=2025-03-10/manifest.json","time_lower_bound":"2025-03-10T00:00:00Z","time_upper_bound":"2025-03-10T23:59:59.999999999Z","events_ingested":3,"ingestion_size":70,"storage_size":1969}]},"hot_tier_enabled":false,"stream_type":"UserDefined","log_source":[{"log_source_format":"Json","fields":[]}]});
+        let expected = serde_json::json!({"version":"v6","schema_version":"v0","objectstore-format":"v6","created-at":"2025-03-10T14:38:29.355131524-04:00","first-event-at":"2025-03-10T14:38:29.356-04:00","owner":{"id":"admin","group":"admin"},"permissions":[{"id":"admin","group":"admin","access":["all"]}],"stats":{"lifetime_stats":{"events":3,"ingestion":70,"storage":1969},"current_stats":{"events":3,"ingestion":70,"storage":1969},"deleted_stats":{"events":0,"ingestion":0,"storage":0}},"snapshot":{"version":"v2","manifest_list":[{"manifest_path":"home/nikhilsinha/Parseable/parseable/data/test10/date=2025-03-10/manifest.json","time_lower_bound":"2025-03-10T00:00:00Z","time_upper_bound":"2025-03-10T23:59:59.999999999Z","events_ingested":3,"ingestion_size":70,"storage_size":1969}]},"hot_tier_enabled":false,"stream_type":"UserDefined","log_source":[{"log_source_format":"Invalid","fields":[]}]});
         let updated_stream_metadata = super::v5_v6(stream_metadata.clone());
         assert_eq!(updated_stream_metadata, expected);
     }