Bump protobuf from 4.25.8 to 5.29.6 in /sdks/python

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
...

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

Author: dependabot[bot]

sdks/python/pyproject.toml

@@ -13,7 +13,7 @@ authors = [
 ]
 requires-python = ">=3.10"
 dependencies = [
-    "protobuf>=3.20.3,<5.0.0",
+    "protobuf>=3.20.3,<6.0.0",
 ]
 
 [project.scripts]