Bump protobuf in /examples/research_projects/decision_transformer (#19176)
Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.19.4 to 3.19.5.
- [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/v3.19.4...v3.19.5)
---
updated-dependencies:
- dependency-name: protobuf
dependency-type: direct:production
...
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