doc: fix markup for PG 12 rel notes

Bruce Momjian <bruce@momjian.us>

Commit: 0fca8285ea533fa669a372c91fdb42265dcf7435
Author: Bruce Momjian <bruce@momjian.us>
Date: 2019-05-21T20:19:43Z
Releases: 12.0
doc:  fix markup for PG 12 rel notes

Files

PathChange+/−
doc/src/sgml/release-12.sgml modified +1 −1

Documentation touched