relnotes: improve wording of several PG 15 items

Bruce Momjian <bruce@momjian.us>

Commit: 15ff26d559537989e17b8bd23c99ae7ca75f0691
Author: Bruce Momjian <bruce@momjian.us>
Date: 2022-07-19T17:35:00Z
Releases: 15.0
relnotes:  improve wording of several PG 15 items

Reported-by: Justin Pryzby

Discussion: https://postgr.es/m/20220719012322.GD12702@telsasoft.com

Backpatch-through: 15 only

Files

PathChange+/−
doc/src/sgml/release-15.sgml modified +19 −36

Documentation touched