Fix typo in ROUGE metrics

This PR fixes a small typo in the ROUGE metrics, replacing "rogue" with "rouge"

README.md

@@ -32,23 +32,23 @@ model-index:
       name: "SAMSum Corpus: A Human-annotated Dialogue Dataset for Abstractive Summarization" 
       type: samsum
     metrics:
-       - name: Validation ROGUE-1
-         type: rogue-1
+       - name: Validation ROUGE-1
+         type: rouge-1
          value: 54.3921
-       - name: Validation ROGUE-2
-         type: rogue-2
+       - name: Validation ROUGE-2
+         type: rouge-2
          value: 29.8078
-       - name: Validation ROGUE-L
-         type: rogue-l
+       - name: Validation ROUGE-L
+         type: rouge-l
          value: 45.1543
-       - name: Test ROGUE-1
-         type: rogue-1
+       - name: Test ROUGE-1
+         type: rouge-1
          value: 53.3059
-       - name: Test ROGUE-2
-         type: rogue-2
+       - name: Test ROUGE-2
+         type: rouge-2
          value: 28.355
-       - name: Test ROGUE-L
-         type: rogue-l
+       - name: Test ROUGE-L
+         type: rouge-l
          value: 44.0953 
 ---
 ## `bart-large-xsum-samsum`