Update types-protobuf requirement (#243)

---
updated-dependencies:
- dependency-name: types-protobuf
  dependency-version: 6.30.2.20250506
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -28,7 +28,7 @@ grpcio-tools = "1.70.0"
 jsonpickle = ">=3.0,<4.1"
 pymitter = ">=0.4,<1.1"
 typing-extensions = ">=4.11,<4.14"
-types-protobuf = "6.30.2.20250503"
+types-protobuf = "6.30.2.20250506"
 pympler = "1.1"
 numpy = "2.0.2"