[noissue]: Update protobuf requirement

Updates the requirements on [protobuf](https://github.com/protocolbuffers/protobuf) to permit the latest version.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v4.22.0-rc1...v5.28.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -55,7 +55,7 @@ dependencies = [
   "opentelemetry-api>=1.27.0,<1.28",
   "opentelemetry-sdk>=1.27.0,<1.28",
   "opentelemetry-exporter-otlp-proto-http>=1.27.0,<1.28",
-  "protobuf>=4.21.1,<5.0",
+  "protobuf>=4.21.1,<6.0",
   "pulp-glue>=0.18.0,<0.30",
   "pygtrie>=2.5,<=2.5.0",
   "psycopg[binary]>=3.1.8,<=3.2.3",