ci: fix a bug that prebuilt binaries aren't published to GitHub Releases

[suzuki-shunsuke]

omekasy v1.2.1 and v1.2.2 don't have prebuilt binaries.

https://github.com/ikanago/omekasy/releases/tag/v1.2.2

Prebuilt binaries were built in CI, but they weren't published because the input of softprops/action-gh-release files is empty.

https://github.com/ikanago/omekasy/actions/runs/6284001639/job/17064954741

Run softprops/action-gh-release@v1
  with:
    token: ***
  env:
    PROJECT_NAME: omekasy
    PKG_PATH: omekasy-v1.2.2-x86_64-unknown-linux-gnu.tar.gz
    GITHUB_TOKEN: ***
👩‍🏭 Creating new GitHub release for tag v1.2.2...
🤔  not include valid file.
🎉 Release ready at https://github.com/ikanago/omekasy/releases/tag/v1.2.2

[suzuki-shunsuke]

This bug was caused by the following changes.

• https://github.com/ikanago/omekasy/pull/43
• https://github.com/ikanago/omekasy/commit/caa7c85f2c85b6d971157549242283087bc6c25a

[ikanago]

Thank you for your first contribution! This is really helpful fix as I could not figure out why the prebuilt binaries are not shipped. I'm going to release v1.2.3 soon.

[ikanago]

v1.2.3 and the prebuilt binaries are successfully shipped! I appreciate your contribution again 🙏 https://github.com/ikanago/omekasy/releases/tag/v1.2.3