Bump protobuf (#4438)

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.25.8 to 5.29.6.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-version: 5.29.6
  dependency-type: direct:production
...

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community-content/vertex-distributed-training/a3mega/llama-3-8b-nemo-pretraining/docker/requirements.txt

@@ -2,7 +2,7 @@ dllogger@git+https://github.com/NVIDIA/dllogger@v1.0.0
 
 # Fixing these libraries versions to avoid conflicting or broken packages.
 immutabledict==4.2.1
-protobuf==4.25.8
+protobuf==5.29.6
 opencv-python-headless==4.11.0.86
 docutils==0.16
 urllib3==2.6.3

community-content/vertex-distributed-training/a3mega/llama-3-8b-nemo-pretraining/requirements.txt

@@ -31,7 +31,7 @@ packaging==25.0
 pathspec==0.12.1
 platformdirs==4.3.8
 proto-plus==1.26.1
-protobuf==5.29.4
+protobuf==5.29.6
 pyasn1==0.6.2
 pyasn1_modules==0.4.2
 pydantic==2.11.4