[INLONG-12199][SDK] Fix the issue where sending on an already-closed channel during shutdown causes a panic in Dataproxy Go SDK - #12206

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/labeler@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/