[Docs] add validation file tpye (#5259)

Signed-off-by: jason.lai <[email protected]>

docs/user_guide/data_types_and_io/flytefile.md

@@ -68,4 +68,26 @@ You can run the workflow locally as follows:
 :lines: 75-95
 ```
 
+You can enable type validation if you have the [python-magic](https://pypi.org/project/python-magic/) package installed.
+
+```{eval-rst}
+.. tabs::
+
+  .. group-tab:: Mac OS
+
+    .. code-block:: bash
+
+      brew install libmagic
+
+  .. group-tab:: Linux
+
+    .. code-block:: bash
+
+      sudo apt-get install libmagic1
+```
+
+:::{note}
+Currently, type validation is only supported on the `Mac OS` and `Linux` platforms.
+:::
+
 [flytesnacks]: https://github.com/flyteorg/flytesnacks/tree/master/examples/data_types_and_io/