Add LakeSoul to the list of Known Users (#8536)

Signed-off-by: chenxu <chenxu@dmetasoul.com>
Co-authored-by: chenxu <chenxu@dmetasoul.com>

docs/source/user-guide/introduction.md

@@ -106,6 +106,7 @@ Here are some active projects using DataFusion:
 - [GlareDB](https://github.com/GlareDB/glaredb) Fast SQL database for querying and analyzing distributed data.
 - [InfluxDB IOx](https://github.com/influxdata/influxdb_iox) Time Series Database
 - [Kamu](https://github.com/kamu-data/kamu-cli/) Planet-scale streaming data pipeline
+- [LakeSoul](https://github.com/lakesoul-io/LakeSoul) Open source LakeHouse framework with native IO in Rust.
 - [Lance](https://github.com/lancedb/lance) Modern columnar data format for ML
 - [Parseable](https://github.com/parseablehq/parseable) Log storage and observability platform
 - [qv](https://github.com/timvw/qv) Quickly view your data