[ACTION] Upload qemu log on pytest failure

Author: darthcloud

.github/workflows/pytest.yml

@@ -35,6 +35,7 @@ jobs:
         qemu-system-xtensa -machine esp32 -drive file=build/flash_image.bin,if=mtd,format=raw -serial file:serial_log.txt -display none -nic user,model=open_eth,id=lo0,hostfwd=tcp:127.0.0.1:8001-:80 -daemonize
         pytest
     - name: Upload artifact
+      if: '!cancelled()'
       uses: actions/upload-artifact@v4
       with:
         name: serial_log