Bump protobuf from 3.20.1 to 3.20.2

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.20.1 to 3.20.2.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/generate_changelog.py)
- [Commits](https://github.com/protocolbuffers/protobuf/compare/v3.20.1...v3.20.2

)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -9,7 +9,7 @@ onnx==1.11.0
 onnxoptimizer
 onnxruntime==1.11.1
 pre-commit==2.9.2
-protobuf==3.20.1
+protobuf==3.20.2
 pyscaffold==3.2.1
 scipy==1.5.2
 setupext-janitor>=1.1.2