chore(mods): bump eng in the submodules group

Bumps the submodules group with 1 update: [eng](https://github.com/dailydevops/dotnet-engineering).


Updates `eng` from `84ba88e` to `6c4b9dd`
- [Commits](https://github.com/dailydevops/dotnet-engineering/compare/84ba88e00013feed82025fbd10a0f5f361c5f486...6c4b9ddb5ea9df3549224fefbed3b2df7060c4c1)

---
updated-dependencies:
- dependency-name: eng
  dependency-type: direct:production
  dependency-group: submodules
...

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

Author: dependabot[bot]