Bump nvidia/cuda in /.devcontainer
Bump nvidia/cuda in /.devcontainer

Bumps nvidia/cuda from 11.2.1-cudnn8-devel-ubuntu20.04 to 11.6.2-cudnn8-devel-ubuntu20.04.

---
updated-dependencies:
- dependency-name: nvidia/cuda
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
deepmind/meltingpot,deepmind/meltingpot