Bump pem from 3.0.3 to 3.0.4

Bumps [pem](https://github.com/jcreekmore/pem-rs) from 3.0.3 to 3.0.4.
- [Changelog](https://github.com/jcreekmore/pem-rs/blob/master/CHANGELOG.md)
- [Commits](jcreekmore/pem-rs@v3.0.3...v3.0.4)

---
updated-dependencies:
- dependency-name: pem
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>