Upload enhanced train data for natural-questions

Source dataset: sentence-transformers/natural-questions
(dataset name: natural-questions).
Hard negatives mined with model: sentence-transformers/all-MiniLM-L6-v2.
Mining params: max_score=0.8, num_negatives=1, relative_margin=0.05, absolute_margin=0.03, range_max=100.

README.md

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+---
+dataset_info:
+  config_name: natural-questions-1HN
+  features:
+  - name: query
+    dtype: string
+  - name: answer
+    dtype: string
+  - name: negative_1
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 123370253
+    num_examples: 97724
+  download_size: 80448280
+  dataset_size: 123370253
+configs:
+- config_name: natural-questions-1HN
+  data_files:
+  - split: train
+    path: natural-questions-1HN/train-*
+---

natural-questions-1HN/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:35c4fe30b10690dbaff3246335b1549d1d554aa845e0ebff2ab44b6fb74bb7bf
+size 80448280