Change label_as_duplicate to false in workflow (microsoft#5773)

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Author: Trenly

.github/workflows/automatic-issue-deduplication.yml

@@ -16,4 +16,4 @@ jobs:
         uses: pelikhan/action-genai-issue-dedup@v0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          label_as_duplicate: true
+          label_as_duplicate: false