Update protobuf requirement from ==5.27.* to ==5.28.* (#399)

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@v5.27.0-rc1...v5.28.2)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -83,7 +83,7 @@ dependencies = [
         'packaging',
         'tlds>=2020041600',
         'text-unidecode==1.*',
-        'protobuf==5.27.*',
+        'protobuf==5.28.*',
         'cryptography>=3.4.2',
         'pycryptodome==3.20.*',
         'sepaxml==2.6.*',