Bump com.mebigfatguy.fb-contrib:fb-contrib from 7.6.5 to 7.6.8 (#6093)

Bumps [com.mebigfatguy.fb-contrib:fb-contrib](https://github.com/mebigfatguy/fb-contrib) from 7.6.5 to 7.6.8.
- [Commits](https://github.com/mebigfatguy/fb-contrib/compare/v7.6.5...v7.6.8)

---
updated-dependencies:
- dependency-name: com.mebigfatguy.fb-contrib:fb-contrib
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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