Bump the cargo group with 2 updates

Bumps the cargo group with 2 updates: [base64](https://github.com/marshallpierce/rust-base64) and [libc](https://github.com/rust-lang/libc).


Updates `base64` from 0.22.1 to 0.23.1
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.22.1...v0.23.1)

Updates `libc` from 0.2.190 to 0.2.191
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Changelog](https://github.com/rust-lang/libc/blob/0.2.191/CHANGELOG.md)
- [Commits](rust-lang/libc@0.2.190...0.2.191)

---
updated-dependencies:
- dependency-name: base64
  dependency-version: 0.23.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: cargo
- dependency-name: libc
  dependency-version: 0.2.191
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: cargo
...

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Author: dependabot[bot]