pg_upgrade: Update obsolescent documentation note
Recently released xfsprogs 5.1.0 has reflink support enabled by
default, so the note that it's not enabled by default can be removed.
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/4552c0f566667160ab3eeaf1620ebb969c1e7eb0
Modified Files
--------------
doc/src/sgml/ref/pgupgrade.sgml | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)