Merge branch 'master' of github.com:git/git

Merge branch 'master' of github.com:git/git

* 'master' of github.com:git/git: (51 commits)
  Hopefully the last batch of fixes before 2.44 final
  Git 2.43.2
  A few more fixes before -rc1
  write-or-die: fix the polarity of GIT_FLUSH environment variable
  A few more topics before -rc1
  completion: add and use __git_compute_second_level_config_vars_for_section
  completion: add and use __git_compute_first_level_config_vars_for_section
  completion: complete 'submodule.*' config variables
  completion: add space after config variable names also in Bash 3
  receive-pack: use find_commit_header() in check_nonce()
  ci(linux32): add a note about Actions that must not be updated
  ci: bump remaining outdated Actions versions
  unit-tests: do show relative file paths on non-Windows, too
  receive-pack: use find_commit_header() in check_cert_push_options()
  prune: mark rebase autostash and orig-head as reachable
  sequencer: unset GIT_CHERRY_PICK_HELP for 'exec' commands
  ref-filter.c: sort formatted dates by byte value
  ssh signing: signal an error with a negative return value
  bisect: document command line arguments for "bisect start"
  bisect: document "terms" subcommand more fully
  ...