Add evaluation results on the amazon config and test split of squadshifts

Beep boop, I am a bot from Hugging Face's automatic model evaluator 👋!\
Your model has been evaluated on the amazon config and test split of the [squadshifts](https://huggingface.co/datasets/squadshifts) dataset by @viralshanker , using the predictions stored [here](https://huggingface.co/datasets/autoevaluate/autoeval-eval-squadshifts-amazon-74b272-2017966729).\
Accept this pull request to see the results displayed on the [Hub leaderboard](https://huggingface.co/spaces/autoevaluate/leaderboards?dataset=squadshifts).\
Evaluate your model on more datasets [here](https://huggingface.co/spaces/autoevaluate/model-evaluator?dataset=squadshifts).

README.md

@@ -27,6 +27,23 @@ model-index:
       type: total
       value: 11869
       verified: true
+  - task:
+      type: question-answering
+      name: Question Answering
+    dataset:
+      name: squadshifts
+      type: squadshifts
+      config: amazon
+      split: test
+    metrics:
+    - name: Exact Match
+      type: exact_match
+      value: 70.14
+      verified: true
+    - name: F1
+      type: f1
+      value: 83.3389
+      verified: true
 ---
 
 # roberta-base for QA