apply content_template (#9598)

Author: makocchi-git

content/en/docs/tutorials/_index.md

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 title: Tutorials
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 This section of the Kubernetes documentation contains tutorials.
 A tutorial shows how to accomplish a goal that is larger than a single
 [task](/docs/tasks/). Typically a tutorial has several sections,
 each of which has a sequence of steps.
 Before walking through each tutorial, you may want to bookmark the
 [Standardized Glossary](/docs/reference/glossary/) page for later references.
 
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 ## Basics
 
 * [Kubernetes Basics](/docs/tutorials/kubernetes-basics/) is an in-depth interactive tutorial that helps you understand the Kubernetes system and try out some basic Kubernetes features.
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 * [Using Source IP](/docs/tutorials/services/source-ip/)
 
-## What's next
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 If you would like to write a tutorial, see
 [Using Page Templates](/docs/home/contribute/page-templates/)
 for information about the tutorial page type and the tutorial template.
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