Fix dead links to inchi-trust (#3451)
Fix dead links to inchi-trust (#3451)

The InChI Trust website has changed the locations of the documentation and FAQ for the InChI software APIs.

I have updated the link for the FAQ, but unfortunately the User Guide is no longer directly linkable, but is available for download as part of a zip file of documentation from the main downloads page.
ptosco/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,greglandrum/rdkit,greglandrum/rdkit,rdkit/rdkit,ptosco/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,greglandrum/rdkit,bp-kelley/rdkit,rdkit/rdkit,rdkit/rdkit,greglandrum/rdkit,rdkit/rdkit,rdkit/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,greglandrum/rdkit,rdkit/rdkit,ptosco/rdkit,ptosco/rdkit,greglandrum/rdkit,ptosco/rdkit,ptosco/rdkit,greglandrum/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,greglandrum/rdkit