docs: update online directory and parent pointer repair sections

Update the case studies of online directory and parent pointer
reconstruction to reflect what they actually do in the final version.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-04-15 14:55:08 -07:00
commit 5220727ce8