Bump third_party/nanopb/repo from d9ecc77 to 9c11463

Bumps [third_party/nanopb/repo](https://github.com/nanopb/nanopb) from `d9ecc77` to `9c11463`.
- [Commits](nanopb/nanopb@d9ecc77...9c11463)

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

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