build(deps): bump protobuf from 3.20.3 to 5.29.3

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.20.3 to 5.29.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.20.3...v5.29.3)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -171,7 +171,7 @@ webdriver_manager==4.0.1
 
 # Security and audit
 mistune==3.0.2
-protobuf==3.20.3
+protobuf==5.29.3
 mako==1.3.3
 paramiko==3.4.0 # not directly required, fixes Blowfish deprecation warning
 certifi>=2023.7.22 # not directly required, pinned by Snyk to avoid a vulnerability