Some spelling adjustments in release notes

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/7514208fbb29f62511c77d2ce4f9ec0608487426

Modified Files
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doc/src/sgml/release-9.2.sgml |   16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)

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