upgrade: don't use `dd status=none` in the test
This breaks on Windows, so lets use `>2 /dev/null` like in the other tests.
Differential Revision: https://phab.mercurial-scm.org/D11873
--- a/tests/test-upgrade-repo.t Mon Dec 06 10:23:51 2021 +0100
+++ b/tests/test-upgrade-repo.t Tue Dec 07 10:03:00 2021 +0100
@@ -1667,7 +1667,7 @@
$ hg debugformat -v | grep dirstate-v2
dirstate-v2: yes no no
$ hg status
- $ dd status=none bs=12 count=1 if=.hg/dirstate
+ $ dd bs=12 count=1 if=.hg/dirstate 2> /dev/null
dirstate-v2
Downgrade from dirstate-v2