doc: mention pg_upgrade extension script
authorBruce Momjian
Mon, 9 Aug 2021 01:05:46 +0000 (21:05 -0400)
committerBruce Momjian
Mon, 9 Aug 2021 01:05:46 +0000 (21:05 -0400)
commitff18b8d1b169b2bf47daab7d92c5376bc19c0748
tree4960e9236f4809794826678c37dab3d46b4ee5f2
parent410c5a08df4381917cd6da7d94609644e10ca322
doc:  mention  pg_upgrade extension script

Since commit e462856a7a, pg_upgrade automatically creates a script to
update extensions, so mention that instead of ALTER EXTENSION.

Backpatch-through: 9.6
doc/src/sgml/ref/pgupgrade.sgml