Add dataset_versioning section to doc

PiperOrigin-RevId: 259525915

Author: Conchylicultor

docs/_book.yaml

@@ -19,6 +19,8 @@ upper_tabs:
       contents:
       - title: Overview
         path: /datasets/overview
+      - title: Versioning
+        path: /datasets/datasets_versioning
       - title: Splits
         path: /datasets/splits
       - title: Add a dataset

docs/datasets_versioning.md

@@ -82,7 +82,7 @@ use. For example:
 
 ```py
 tfds.load('imagenet2012:2.0.1')
-tfds.builder('imagenet2012:2.0.1'')
+tfds.builder('imagenet2012:2.0.1')
 
 tfds.load('imagenet2012:2.0.0')  # Error: unsupported version.