ci: re-trigger checks (flaky docker-builder integration test timeout)

The docker-builder integration tests time out at the default 5s on the
emulated riscv64 cross-build when the build cache is cold; unrelated to
the env_file/env config changes in this PR.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016vnD51QAGwAvqaZuEZJypr

Author: claude