Bump protobuf from 3.19.4 to 3.19.5 in /vision/dino/pytorch

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](protocolbuffers/protobuf@v3.19.4...v3.19.5)

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

Signed-off-by: dependabot[bot] <[email protected]>

vision/dino/pytorch/requirements.txt

@@ -9,5 +9,5 @@ pytest==6.2.4
 pyyaml==5.4.1
 horovod==0.24.3
 wandb==0.12.8
-protobuf==3.19.4
+protobuf==3.19.5
 git+https://github.com/graphcore/examples-utils@0f3024827451878955ed495daf2e1b552eaf749f#egg=examples-utils