Bump .xtreme-firmware from ef2ad55 to 6cea80c

Bumps [.xtreme-firmware](https://github.com/ClaraCrazy/Flipper-Xtreme) from `ef2ad55` to `6cea80c`.
- [Release notes](https://github.com/ClaraCrazy/Flipper-Xtreme/releases)
- [Commits](Flipper-XFW/Xtreme-Firmware@ef2ad55...6cea80c)

---
updated-dependencies:
- dependency-name: ".xtreme-firmware"
  dependency-type: direct:production
...

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