Bump the submodules group with 1 update

Bumps the submodules group with 1 update: [cpp/mqt-core](https://github.com/cda-tum/mqt-core).


Updates `cpp/mqt-core` from `87f97a3` to `a392c48`
- [Release notes](https://github.com/cda-tum/mqt-core/releases)
- [Commits](cda-tum/mqt-core@87f97a3...a392c48)

---
updated-dependencies:
- dependency-name: cpp/mqt-core
  dependency-type: direct:production
  dependency-group: submodules
...

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