Bump portable-atomic from 1.11.1 to 1.12.0 in /src/_bcrypt (#1127)

Bumps [portable-atomic](https://github.com/taiki-e/portable-atomic) from 1.11.1 to 1.12.0.
- [Release notes](https://github.com/taiki-e/portable-atomic/releases)
- [Changelog](https://github.com/taiki-e/portable-atomic/blob/main/CHANGELOG.md)
- [Commits](taiki-e/portable-atomic@v1.11.1...v1.12.0)

---
updated-dependencies:
- dependency-name: portable-atomic
  dependency-version: 1.12.0
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]