Use upload-artifact@v3 on Gitea refresh workflows.

v4 is unsupported on this Gitea host and was failing the job after a successful refresh; keep continue-on-error so summary upload cannot mask refresh success.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/workflows/web-daily.yml

@@ -64,7 +64,9 @@ jobs:
 
       - name: Save refresh summary
         if: always()
-        uses: actions/upload-artifact@v4
+        continue-on-error: true
+        # v4 artifact API unsupported on Gitea; v3 still uploads for notify digests.
+        uses: actions/upload-artifact@v3
         with:
           name: web-daily-refresh-${{ github.run_id }}
           path: web/.refresh/summary.json