pgsql: doc: apply hypen fix that was not backpatched

doc: apply hypen fix that was not backpatched

Head patch was 42ec6c2da699e8e0b1774988fa97297a2cdf716c.

Reported-by: Alexander Law

Discussion: 5785FBE7.7060508@gmail.com

Backpatch-through: 9.1

Branch
------
REL9_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/aea496cac1d61a382ec0e81e9681654f70c3e8c2

Modified Files
--------------
doc/src/sgml/runtime.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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