Add yarn install to generate yarn.lock file in Netron directory

Tools/WinMLDashboard/package.json

@@ -19,7 +19,7 @@
     "nuget-restore-cpp": "nuget restore src/cpp/DebugRunner.sln",
     "electron-dev": "electron . http://localhost:3000",
     "electron-prod": "yarn nuget-restore-cpp && yarn build-cpp && yarn build-electron && electron .",
-    "lock-netron-deps": "yarn --cwd deps/Netron upgrade d3@5.16.0 flatbuffers@1.12.0"
+    "lock-netron-deps": "yarn --cwd deps/Netron install && yarn --cwd deps/Netron upgrade d3@5.16.0 flatbuffers@1.12.0"
   },
   "build": {
     "appId": "com.microsoft.dashboard.winml",