Bump themes/hextra from cb3373d to bbe3c46 (#49)

Bumps [themes/hextra](https://github.com/imfing/hextra) from `cb3373d` to `bbe3c46`.
- [Release notes](https://github.com/imfing/hextra/releases)
- [Commits](imfing/hextra@cb3373d...bbe3c46)

---
updated-dependencies:
- dependency-name: themes/hextra
  dependency-type: direct:production
...

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