framework: update checkout.

Submodule framework 6af0b65..048532d:
  > hooks/fancy: fix checking for falling edge, revert of 12c10e57d48a18e4a72625f217219d8dc900e48b.
  > scripts/shell: rework error handling.
  > scripts/shell: ditch _runner_untrap as it fails to untrap signals somewhy; do this manually.