Bump third_party/pigweed/repo from e35aa3a to 763cd05

Bumps [third_party/pigweed/repo](https://github.com/google/pigweed) from `e35aa3a` to `763cd05`.
- [Commits](google/pigweed@e35aa3a...763cd05)

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

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