[Doc][Data] fix big-data-ingestion broken links (ray-project#24631)

The links were broken. Fixed it.

doc/source/data/examples/big_data_ingestion.ipynb

@@ -243,7 +243,7 @@
  "more machines.\n",
  "\n",
  "To ingest 500GiB of data, we'll set up a Ray Cluster.\n",
- "The provided :download:`big_data_ingestion.yaml <../big_data_ingestion.yaml>`\n",
+ "The provided [big_data_ingestion.yaml](https://raw.githubusercontent.com/ray-project/ray/master/doc/source/data/big_data_ingestion.yaml)\n",
  "cluster config can be used to set up an AWS cluster with 70 CPU nodes and\n",
  "16 GPU nodes. Using following command to bring up the Ray cluster.\n",
  "\n",
@@ -362,7 +362,7 @@
  "# -> throughput: 8.56GiB/s\n",
  "```\n",
  "\n",
- "Note: The pipeline can also be submitted using :ref:`Ray Job Submission <jobs-overview>`,\n",
+ "Note: The pipeline can also be submitted using [Ray Job Submission](https://docs.ray.io/en/latest/cluster/job-submission.html) ,\n",
  "which is in beta starting with Ray 1.12. Try it out!"
  ]
  }