git: 6c962690245a..feff9dfed3df - vendor/openzfs/master - vendor branch updated

From: Martin Matuska <mm_at_FreeBSD.org>
Date: Sat, 10 Jun 2023 11:27:08 UTC
The branch vendor/openzfs/master has been updated by mm:

URL: https://cgit.FreeBSD.org/src/log/?id=6c962690245a..feff9dfed3df

55b1842f92a2 ZIL: Fix race introduced by f63811f0721.
b3ad3f48d9d2 Use list_remove_head() where possible.
90ccfd426d9c Improve l2arc reporting in arc_summary.
6db4ed51d6c2 ZTS: Skip checkpoint_discard_busy
70ea484e3ec5 Finally drop long disabled vdev cache.
feff9dfed3df Fix the L2ARC write size calculating logic (2)