Update CHANGELOG to mention concurrency support in gcl_writer
### New features
-- Add `gcl_writer` Google Cloud Platform Cloud Logging connector for writing log entries
+- Add `gcl_writer` Google Cloud Platform Cloud Logging connector for writing log entries, with in-flight concurrency support.
- Add reverse functions and tests for arrays and strings, add sort test for arrays
- Add a ClickHouse connector
- Add a GCS streamer connector
