Bump third_party/pigweed/repo from 6c33386 to edfc804

Bumps [third_party/pigweed/repo](https://github.com/google/pigweed) from `6c33386` to `edfc804`.
- [Commits](pigweed-project/pigweed@6c33386...edfc804)

---
updated-dependencies:
- dependency-name: third_party/pigweed/repo
  dependency-version: edfc8046316baa3c876a7d7dc405b4101f48e3ac
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]