Bump @fitbit/sdk from 5.0.2 to 6.1.0 in the core group

Bumps the core group with 1 update: [@fitbit/sdk](https://github.com/Fitbit/fitbit-sdk-toolchain).


Updates `@fitbit/sdk` from 5.0.2 to 6.1.0
- [Commits](Fitbit/fitbit-sdk-toolchain@5.0.2...6.1.0)

---
updated-dependencies:
- dependency-name: "@fitbit/sdk"
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: core
...

Signed-off-by: dependabot[bot] <[email protected]>