fix(deps): update dependency protobuf to v6

Author: renovate[bot]

pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
   'pillow',
   # 3.7.0 fixed a bug on parsing some METADATA.pb files.
   # We cannot use v4 because our protobuf files have been compiled with v3.
-  'protobuf>=3.7.0, <4',
+  'protobuf>=6.30.1, <7',
   'requests',
   'tabulate',
   'unidecode',