Bump protobuf from 5.29.5 to 5.29.6 in /setup

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 5.29.5 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
...

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

Author: dependabot[bot]

setup/requirements.txt

@@ -36,7 +36,7 @@ multidict==6.1.0 ; python_version >= "3.9" and python_version < "4.0"
 openai==1.58.1 ; python_version >= "3.9" and python_version < "4.0"
 propcache==0.2.1 ; python_version >= "3.9" and python_version < "4.0"
 proto-plus==1.25.0 ; python_version >= "3.9" and python_version < "4.0"
-protobuf==5.29.5 ; python_version >= "3.9" and python_version < "4.0"
+protobuf==5.29.6 ; python_version >= "3.9" and python_version < "4.0"
 pyasn1-modules==0.4.1 ; python_version >= "3.9" and python_version < "4.0"
 pyasn1==0.6.1 ; python_version >= "3.9" and python_version < "4.0"
 pydantic-core==2.27.2 ; python_version >= "3.9" and python_version < "4.0"