Automated documentation update

PiperOrigin-RevId: 278923614

Author: Conchylicultor

docs/catalog/wikipedia.md

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   <div itemscope itemprop="includedInDataCatalog" itemtype="http://schema.org/DataCatalog">
     <meta itemprop="name" content="TensorFlow Datasets" />
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   <meta itemprop="name" content="wikipedia" />
   <meta itemprop="description" content="Wikipedia dataset containing cleaned articles of all languages.&#10;The datasets are built from the Wikipedia dump&#10;(https://dumps.wikimedia.org/) with one split per language. Each example&#10;contains the content of one full Wikipedia article with cleaning to strip&#10;markdown and unwanted sections (references, etc.).&#10;&#10;&#10;To use this dataset:&#10;&#10;```python&#10;import tensorflow_datasets as tfds&#10;&#10;ds = tfds.load('wikipedia', split='train')&#10;for ex in ds.take(4):&#10;  print(ex)&#10;```&#10;&#10;See [the guide](https://www.tensorflow.org/datasets/overview) for more&#10;informations on [tensorflow_datasets](https://www.tensorflow.org/datasets).&#10;&#10;" />
   <meta itemprop="url" content="https://www.tensorflow.org/datasets/catalog/wikipedia" />
   <meta itemprop="sameAs" content="https://dumps.wikimedia.org" />
   <meta itemprop="citation" content="@ONLINE {wikidump,&#10;    author = &quot;Wikimedia Foundation&quot;,&#10;    title  = &quot;Wikimedia Downloads&quot;,&#10;    url    = &quot;https://dumps.wikimedia.org&quot;&#10;}&#10;" />
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 # `wikipedia`
 
 Wikipedia dataset containing cleaned articles of all languages. The datasets are