Review fix-ups on top of the re-pin:
- pm/lock.json: keep "version": "9.0.1". pm keys the store entry on
`ffmpeg-<version>-<target>` and reinstalls on the artifact sha alone
(pm/install.py::_identity / _entry_current), so the sha change already
re-fetches the four BtbN targets. Bumping the label would also rename the
macOS (martin-riedl, still 9.0.1) and Termux entries and re-stage unchanged
bytes on every existing install for no reason.
- tests/pm/test_ffmpeg_pin_liveness.py: removed. It HEADs live GitHub URLs
from the unit lane, and BtbN prunes dated autobuild tags after ~14 days
(autobuild-2026-09-10-15-31 is already gone), so the test turns red for
every PR on ~Oct 11 by construction. Upstream rot is what
archive-inputs.yml (sha256 mirror on merge) and #122433 (re-pin on fetch
failure) are for.
- website/docs/user-guide/windows-native.md + install.ps1 header: say that
-SkipSetup is accepted as a deprecated alias for -NonInteractive instead of
claiming it is rejected.
(cherry picked from commit def90331c2; ffmpeg lock/liveness hunks dropped, superseded by #125468)
c5380053b5