build(deps): bump fenix from 5bf88a0 to 3c09e6c

Bumps [fenix](https://github.com/nix-community/fenix) from `5bf88a0` to `3c09e6c`.
- [Commits](nix-community/fenix@5bf88a0...3c09e6c)

---
updated-dependencies:
- dependency-name: fenix
  dependency-version: 3c09e6c592c6ebfb9cde94bba990af23b2c06a87
  dependency-type: direct:production
...

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Author: dependabot[bot]