Make GraphQL reference compatible with markdownlint-cli 0.29.0

doc/api/graphql/reference/index.md

@@ -25,9 +25,13 @@ Items (fields, enums, etc) that have been removed according to our [deprecation
 in [Removed Items](../removed_items.md).
 
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 ## `Query` type
 
 The `Query` type contains the API's top-level entry points for all executable queries.

tooling/graphql/docs/templates/default.md.haml

@@ -18,8 +18,12 @@
   in [Removed Items](../removed_items.md).
 
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