updating fonts_public_pb2.py
updating fonts_public_pb2.py

file generated by running:
protoc fonts_public.proto --python_out=.
(follow up to https://github.com/googlefonts/gftools/commit/aa20bb6ef9a82c7abeec20edee911becbde45a4b)

googlefonts/gftools,googlefonts/gftools