Move the note above usage to make it visible enough to notice.

PiperOrigin-RevId: 257499427

Author: yashk2810

tensorflow_datasets/scripts/document_datasets.py

@@ -49,6 +49,12 @@
 file. -->
 # Datasets
 
+Note: The datasets documented here are from `HEAD` and so not all are available
+in the current `tensorflow-datasets` package. They are all accessible in our
+nightly package `tfds-nightly`.
+
+---
+
 ## Usage
 
 ```python
@@ -72,12 +78,6 @@
 np_datasets = tfds.as_numpy(datasets)
 ```
 
-Note: The datasets documented here are from `HEAD` and so not all are available
-in the current `tensorflow-datasets` package. They are all accessible in our
-nightly package `tfds-nightly`.
-
----
-
 ## All Datasets
 
 {toc}