fix(ci): Restore missing 'run' block in arXiv workflow

During a previous modification, the 'run' block for the 'Fetch arXiv papers' step was inadvertently removed, leading to a YAML syntax error in the workflow file. This commit restores the missing 'run' block, fixing the workflow validation error.

Author: Niraj Bajpai

.github/workflows/arxiv-daily-crawler.yml

@@ -51,6 +51,8 @@ jobs:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
         run: |
           python scripts/fetch_arxiv_papers.py
+        run: |
+          python scripts/fetch_arxiv_papers.py
 
       - name: Generate summary report
         run: |