Incorrect links to documentation on website

[artur-sannikov]

Links on Documentation page are:

• Outdated for MOFA2 R package. The correct link is on Bioconductor: https://bioconductor.org/packages/release/bioc/manuals/MOFA2/man/MOFA2.pdf
• Incorrect for Python packages. It's the same outdated link for R package.

[artur-sannikov]

@rargelaguet, this can be frustrating for package users, because some function names were changed, for example plot_weights_fn (see my comment).

Is it possible to update the links?