bug#73425: 31.0.50; Support images in HTML versions of ELPA package manuals

[Stefan Monnier]

>   (kubed                      :url "https://git.sr.ht/~eshel/kubed";
> -  :doc "kubed.texi")
> +  :doc "kubed.texi"
> +  :doc-files ("assets/"))

Actually, `:doc-files` disappeared yesterday.  Now it should "just work".

That is: as long as the file names in the src="..."  are relative to the
place where the doc's source file is located.  I can't see any `assets/`
directory currently in the Kubed source code, so I can't judge whether
that would work.


        Stefan