Typo fix in 04-onnx-export (#6595)

notebooks/04-onnx-export.ipynb

@@ -193,7 +193,7 @@
     "  \n",
     "  assert provider in get_all_providers(), f\"provider {provider} not found, {get_all_providers()}\"\n",
     "\n",
-    "  # Few properties than might have an impact on performances (provided by MS)\n",
+    "  # Few properties that might have an impact on performances (provided by MS)\n",
     "  options = SessionOptions()\n",
     "  options.intra_op_num_threads = 1\n",
     "\n",
@@ -489,4 +489,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 1
-}
\ No newline at end of file
+}