doc: fix typo in release notes
Backpatch through 8.4
Per suggestion by Amit Langote
Branch
------
REL9_3_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/7453b8db75a0216fbcc3843e14c2c7266e6a15be
Modified Files
--------------
doc/src/sgml/release-8.4.sgml | 4 ++--
doc/src/sgml/release-9.0.sgml | 4 ++--
doc/src/sgml/release-9.1.sgml | 4 ++--
doc/src/sgml/release-9.2.sgml | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)