having the `pkgdown` website URL on the repo page

[IndrajeetPatil]

I see that there is an associated pkgdown website for the R package, but it's a bit difficult to find.

Usually, one would expect to find it here on the repo page:

Hope this is of interest.

[BlasBenito]

Dear Indrajeet,
it is definitely of interest, I totally missed that, but it is fixed now.
Thank you very much!

[IndrajeetPatil]

Perfect! :)