?amp; in demos' help urls

[Quy]

Steps to reproduce the issue

Install Test English (GB) Sample Data.
Go to front end.
Under All Modules, click Smart Search.
Click Help in the article.

Expected result

https://help.joomla.org/proxy/index.php?keyref=Help31:Extensions_Module_Manager_Smart_Search

Actual result

https://help.joomla.org/proxy/index.php?amp;keyref=Help31:Extensions_Module_Manager_Smart_Search

Additional comments

nightly staging

[ghost]

Issue confirmed.

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/19149.}

[brianteeman]

The test sample data is never distributed in an actual release. So if you want to fix it then fine but I wouldnt waste any time on it

[Quy]

See #19181