Log Message:
py-fonttools: update to 4.47.0.

4.47.0 (released 2023-12-18)
----------------------------

- [varLib.models] New API for VariationModel: ``getMasterScalars`` and
  ``interpolateFromValuesAndScalars``.
- [varLib.interpolatable] Various bugfixes and rendering improvements. In particular,
  add a Summary page in the front, and an Index and Table-of-Contents in the back.
  Change the page size to Letter.
- [Docs/designspaceLib] Defined a new ``public.fontInfo`` lib key, not used \ 
anywhere yet (#3358).