Bump bcrypt from 4.1.3 to 4.2.1 in /{{ cookiecutter.name }}

Bumps [bcrypt](https://github.com/pyca/bcrypt) from 4.1.3 to 4.2.1.
- [Changelog](https://github.com/pyca/bcrypt/blob/main/release.py)
- [Commits](pyca/bcrypt@4.1.3...4.2.1)

---
updated-dependencies:
- dependency-name: bcrypt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>