[NB] Change c++ version in custom op nb

Author: auphelia

notebooks/advanced/2_custom_op.ipynb

@@ -354,7 +354,7 @@
     "            f.write(cpp_code)\n",
     "        builder = CppBuilder()\n",
     "        # to enable additional debug features please uncommand the next line\n",
-    "        builder.append_includes(\"--std=c++11\")\n",
+    "        builder.append_includes(\"--std=c++17\")\n",
     "        builder.append_includes(\"-O3\")\n",
     "        builder.append_sources(codegen_dir + \"/*.cpp\")\n",
     "        builder.set_executable_path(codegen_dir + \"/node_model\")\n",