Bump libntech from 13a9e99 to 6f49c4c

Bumps [libntech](https://github.com/NorthernTechHQ/libntech) from `13a9e99` to `6f49c4c`.
- [Release notes](https://github.com/NorthernTechHQ/libntech/releases)
- [Commits](NorthernTechHQ/libntech@13a9e99...6f49c4c)

---
updated-dependencies:
- dependency-name: libntech
  dependency-type: direct:production
...

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