chore(deps): update dependency protobuf to v6.33.1

Author: renovate[bot]

requirements.txt

@@ -21,7 +21,7 @@ jsonschema==4.25.0
 jsonschema-specifications==2025.4.1
 markupsafe==3.0.2
 packaging==25.0
-protobuf==6.31.1
+protobuf==6.33.1
 pycparser==2.22 ; platform_python_implementation != 'PyPy'
 pydantic==2.11.7
 pydantic-core==2.35.2