chore: stick to protobufjs 6.11.3 (for now) (#401)

* chore: stick to protobufjs 6.11.3 (for now)

* adding to kalix script

* updated pakcage-lock.json in kalix-script

* fixing grpc-js and proto-loader versions

Author: octonato

npm-js/kalix-scripts/package-lock.json

@@ -12,7 +12,8 @@
   },
   "dependencies": {
     "axios": "^0.27.2",
-    "cross-spawn": "^7.0.3"
+    "cross-spawn": "^7.0.3",
+    "protobufjs": "6.11.3"
   },
   "bin": {
     "kalix-scripts": "./bin/kalix-scripts.js"