doc: clarify text around MVCC example query

Bruce Momjian <bruce@momjian.us>

Commit: 2fa255ce9b9536450c9f86bd7c15778f58cf3777
Author: Bruce Momjian <bruce@momjian.us>
Date: 2024-11-01T20:38:16Z
Releases: 18.0
doc:   clarify text around MVCC example query

Reported-by: marlene.brandstaetter@cargonet.software

Discussion: https://postgr.es/m/167765529052.987840.12345375075704447735@wrigleys.postgresql.org

Backpatch-through: master

Files

PathChange+/−
doc/src/sgml/mvcc.sgml modified +4 −4

Documentation touched