chore(submodule): bump etc/data/nnet from 32b923f to 4783867 (#998)

Bumps etc/data/nnet from `32b923f` to `4783867`.

---
updated-dependencies:
- dependency-name: etc/data/nnet
  dependency-version: 47838672e9fa8131e52e8c8f62ff017e3deafe3c
  dependency-type: direct:production
...

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