docs: Add apache iceberg-rust as user (#4100)

* feat: Add apache iceberg-rust as user

* Fix comments

README.md

@@ -132,6 +132,7 @@ OpenDAL is an active open-source project. We are always open to people who want
 - [OctoBase](https://github.com/toeverything/OctoBase): the open-source database behind [AFFiNE](https://github.com/toeverything/affine), local-first, yet collaborative.
 - [Pants](https://github.com/pantsbuild/pants): A fast, scalable, user-friendly build system for codebases of all sizes.
 - [QuestDB](https://github.com/questdb/questdb): An open-source time-series database for high throughput ingestion and fast SQL queries with operational simplicity.
+- [apache/iceberg-rust](https://github.com/apache/iceberg-rust/): Native Rust implementation of [Apache Iceberg](https://iceberg.apache.org/), the open table format for analytic datasets.
 
 ### C Binding