pin protobuf version in dev dep to match spark connect

https://github.com/apache/spark/blob/v4.0.1/dev/requirements.txt#L64

Author: kevinjqliu

poetry.lock

@@ -102,6 +102,7 @@ moto = { version = "^5.0.2", extras = ["server"] }
 typing-extensions = "4.15.0"
 pytest-mock = "3.15.1"
 pyspark = { version = "4.0.1", extras = ["connect"] }
+protobuf = "5.29.1" # match Spark Connect's gencode
 cython = "3.1.4"
 deptry = ">=0.14,<0.24"
 docutils = "!=0.21.post1"   # https://github.com/python-poetry/poetry/issues/9248#issuecomment-2026240520