Add related to topic "documentation"

Author: shaedrich

topics/documentation/index.md

@@ -4,6 +4,7 @@ display_name: Documentation
 short_description: Documentation is a set of information that describes a product
   to its users.
 topic: documentation
-wikipedia_url: https://en.wikipedia.org/wiki/Software_documentation
+wikipedia_url: https://en.wikipedia.org/wiki/Software_documentation,
+related: tutorial, man-page, documentation-as-code, docblock, doc-gen, api-documentation, knowledge-base, design-document
 ---
 Documentation is a set of information that describes a product to its users, including what it is, how it operates, and how to use it.