change back to relative link

examples/How_to_handle_rate_limits.ipynb

@@ -586,7 +586,7 @@
    "source": [
     "## Example parallel processing script\n",
     "\n",
-    "We've written an example script for parallel processing large quantities of API requests: [api_request_parallel_processor.py](https://github.com/openai/openai-cookbook/blob/main/examples/api_request_parallel_processor.py).\n",
+    "We've written an example script for parallel processing large quantities of API requests: [api_request_parallel_processor.py](api_request_parallel_processor.py).\n",
     "\n",
     "The script combines some handy features:\n",
     "- Streams requests from file, to avoid running out of memory for giant jobs\n",