Update src/content/docs/r2/data-catalog/get-started.mdx

Author: Oxyjun

src/content/docs/r2/data-catalog/get-started.mdx

@@ -135,7 +135,7 @@ We will use [marimo](https://github.com/marimo-team/marimo) as a Python notebook
       uv init
       ```
 
-5. Add marimo and required dependencies:
+4. Add marimo and required dependencies:
 
       ```py
       uv add marimo pyiceberg pyarrow pandas