Update duckdb.mdx (#28149)

* Update duckdb.mdx

* Apply suggestion from @elithrar

---------

Co-authored-by: Matt Silverlock <matt@eatsleeprepeat.net>

Author: gagichce

src/content/docs/r2/data-catalog/config-examples/duckdb.mdx

@@ -13,6 +13,7 @@ Below is an example of using [DuckDB](https://duckdb.org/) to connect to R2 Data
 - [Create an R2 API token](/r2/api/tokens/) with both [R2 and data catalog permissions](/r2/api/tokens/#permissions).
 - Install [DuckDB](https://duckdb.org/docs/installation/).
   - Note: [DuckDB 1.4.0](https://github.com/duckdb/duckdb/releases/tag/v1.4.0) or greater is required to attach and write to [Iceberg REST Catalogs](https://duckdb.org/docs/stable/core_extensions/iceberg/iceberg_rest_catalogs).
+- Note: DuckDB [does not currently support](https://duckdb.org/docs/stable/core_extensions/iceberg/iceberg_rest_catalogs#limitations-for-update-and-delete) `DELETE` on partitioned tables.
 
 ## Example usage