fix(deps): restrict protobuf dependency to version <8

Author: ArthurTonial

pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
     "opentelemetry-instrumentation-langchain>=0.61.0,<1",
     "httpx>=0.27.0,<1",
     "PyJWT>=2.13.0,<3",
-    "protobuf>=7.36.0",
+    "protobuf>=7.36.0,<8",
     "protovalidate>=1.0.0,<2",
     "grpcio>=1.60.0,<2",
     "opentelemetry-api~=1.44.0",