The script was changing to its own directory (.github/workflows)
instead of using the current directory where the workflow already
placed it (_demo/embed/export). This caused the script to look for
go.mod in the wrong location.
Fixed by using pwd instead of changing to the script's directory.
Generated with [codeagent](https://github.com/qbox/codeagent)
Co-authored-by: luoliwoshang <51194195+luoliwoshang@users.noreply.github.com>