Add evaluation results on the kmfoda--booksum config and test split of kmfoda/booksum

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Your model has been evaluated on the kmfoda--booksum config and test split of the [kmfoda/booksum](https://huggingface.co/datasets/kmfoda/booksum) dataset by

@pszemraj

, using the predictions stored [here](https://huggingface.co/datasets/autoevaluate/autoeval-eval-kmfoda__booksum-kmfoda__booksum-e42237-1523455078).\
Accept this pull request to see the results displayed on the [Hub leaderboard](https://huggingface.co/spaces/autoevaluate/leaderboards?dataset=kmfoda/booksum).\
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README.md

@@ -285,6 +285,39 @@ model-index:
       type: gen_len
       value: 179.2184
       verified: true
+  - task:
+      type: summarization
+      name: Summarization
+    dataset:
+      name: kmfoda/booksum
+      type: kmfoda/booksum
+      config: kmfoda--booksum
+      split: test
+    metrics:
+    - name: ROUGE-1
+      type: rouge
+      value: 35.2154
+      verified: true
+    - name: ROUGE-2
+      type: rouge
+      value: 6.8702
+      verified: true
+    - name: ROUGE-L
+      type: rouge
+      value: 17.6693
+      verified: true
+    - name: ROUGE-LSUM
+      type: rouge
+      value: 32.8365
+      verified: true
+    - name: loss
+      type: loss
+      value: 2.9878039360046387
+      verified: true
+    - name: gen_len
+      type: gen_len
+      value: 200.6785
+      verified: true
 ---
 
 # pszemraj/pegasus-x-large-book-summary