fix(deps): update dependency google-protobuf to v4

Author: renovate[bot]

examples/grpc-js/package.json

@@ -38,7 +38,7 @@
     "@opentelemetry/semantic-conventions": "^1.22.0",
     "@opentelemetry/sdk-trace-base": "^1.0.1",
     "@opentelemetry/sdk-trace-node": "^1.0.1",
-    "google-protobuf": "^3.9.2"
+    "google-protobuf": "^4.0.0"
   },
   "homepage": "https://github.com/open-telemetry/opentelemetry-js/tree/main/examples/grpc-js",
   "devDependencies": {