minor #12884 Fixed a wrong reference (javiereguiluz)

This PR was merged into the 4.3 branch.

Discussion
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Fixed a wrong reference

Commits
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9d8285f Fixed a wrong reference

Author: javiereguiluz

templating/hinclude.rst

@@ -10,7 +10,7 @@ performance you can use the `hinclude.js`_ JavaScript library to embed
 controllers asynchronously.
 
 First, include the `hinclude.js`_ library in your page
-ref:`linking to it <templates-link-to-assets>` from the template or adding it
+:ref:`linking to it <templates-link-to-assets>` from the template or adding it
 to your application JavaScript :doc:`using Webpack Encore </frontend>`.
 
 As the embedded content comes from another page (or controller for that matter),