fix(deps): Update dependency protobuf to v5.29.5 [SECURITY] (#301)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [protobuf](https://developers.google.com/protocol-buffers/) | patch | `==5.29.4` -> `==5.29.5` |

### GitHub Vulnerability Alerts

#### [CVE-2025-4565](https://redirect.github.com/protocolbuffers/protobuf/security/advisories/GHSA-735f-pc8j-v9w8)

### Summary
Any project that uses Protobuf pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of **recursive groups**, **recursive messages** or **a series of [`SGROUP`](https://protobuf.dev/programming-guides/encoding/#groups) tags** can be corrupted by exceeding the Python recursion limit.

Reporter: Alexis Challande, Trail of Bits Ecosystem Security Team
[ecosystem@trailofbits.com](mailto:ecosystem@trailofbits.com)

Affected versions: This issue only affects the [pure-Python implementation](https://redirect.github.com/protocolbuffers/protobuf/tree/main/python#implementation-backends) of protobuf-python backend. This is the implementation when `PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python` environment variable is set or the default when protobuf is used from Bazel or pure-Python PyPi wheels. CPython PyPi wheels do not use pure-Python by default.

This is a Python variant of a [previous issue affecting protobuf-java](https://redirect.github.com/protocolbuffers/protobuf/security/advisories/GHSA-735f-pc8j-v9w8).

### Severity
This is a potential Denial of Service. Parsing nested protobuf data creates unbounded recursions that can be abused by an attacker.

### Proof of Concept
For reproduction details, please refer to the unit tests [decoder_test.py](https://redirect.github.com/protocolbuffers/protobuf/blob/main/python/google/protobuf/internal/decoder_test.py#L87-L98) and [message_test](https://redirect.github.com/protocolbuffers/protobuf/blob/main/python/google/protobuf/internal/message_test.py#L1436-L1478)

### Remediation and Mitigation
A mitigation is available now. Please update to the latest available versions of the following packages:
* protobuf-python(4.25.8, 5.29.5, 6.31.1)

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Author: cq-bot

setup.py

@@ -22,7 +22,7 @@
     "packaging==24.2",
     "pandas==2.2.3",
     "pluggy==1.5.0",
-    "protobuf==5.29.4",
+    "protobuf==5.29.5",
     "pyarrow==19.0.1",
     "pytest==8.3.5",
     "python-dateutil>=2.8.1",