Need to update Open VSX FAQ

We need to publish updates to the Open VSX FAQ here: https://www.eclipse.org/legal/open-vsx-registry-faq/. Edits are in this Google doc: https://docs.google.com/document/d/1OOxwahjBE2SAmvGTk83UoSOCtpH-L1kZ-OniC2ZjwP0/edit.

Thanks!