Update protobuf version to address this warning: ``` google-api-core 1.23.0 requires protobuf>=3.12.0, but you'll have protobuf 3.9.2 which is incompatible. ```
Update protobuf version to address this warning:
```
google-api-core 1.23.0 requires protobuf>=3.12.0, but you'll have protobuf 3.9.2 which is incompatible.
```

PiperOrigin-RevId: 343866418

google/deepvariant,google/deepvariant,google/deepvariant