chore(submodule): bump etc/data/nnet from 636c5e8 to f43cee9 (#1055)

Bumps etc/data/nnet from `636c5e8` to `f43cee9`.

---
updated-dependencies:
- dependency-name: etc/data/nnet
  dependency-version: f43cee9e391eb1db30f61f125ecc7f7d3f3cf37e
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]