Apply suggestions from code review

Co-authored-by: Aditya Sharad <6874315+adityasharad@users.noreply.github.com>

.github/workflows/csv-coverage-pr-artifacts.yml

@@ -75,10 +75,9 @@ jobs:
     - name: Save PR number
       run: |
         mkdir -p pr
-        echo ${{ github.event.number }} > pr/NR
+        echo ${{ github.event.pull_request.number }} > pr/NR
     - name: Upload PR number
       uses: actions/upload-artifact@v2
       with:
         name: pr
         path: pr/
-

.github/workflows/csv-coverage-pr-comment.yml

@@ -56,7 +56,7 @@ jobs:
       run: |
         PR=$(cat "pr/NR")
         python misc/scripts/library-coverage/compare-files-comment-pr.py \
-          out_merge out_base comparison.md ${{ github.repository }} $PR $RUN_ID
+          out_merge out_base comparison.md "$GITHUB_REPOSITORY" "$PR" "$RUN_ID"
     - name: Upload comparison results
       uses: actions/upload-artifact@v2
       with: