Bump third_party/nanopb/repo from 423c03b to 1f0c2e1

Bumps [third_party/nanopb/repo](https://github.com/nanopb/nanopb) from `423c03b` to `1f0c2e1`.
- [Commits](nanopb/nanopb@423c03b...1f0c2e1)

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

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