pgsql: Fix pg_description entries for jsonb_to_record() and jsonb_to_re

Fix pg_description entries for jsonb_to_record() and jsonb_to_recordset().

All the other jsonb function descriptions refer to the arguments as being
"jsonb", but these two said "json".  Make it consistent.  Per bug #13905
from Petru Florin Mihancea.

No catversion bump --- we can't force one in the back branches, and this
isn't very critical anyway.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/a4627e8fd479ff74fffdd49ad07636b79751be45

Modified Files
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src/include/catalog/pg_proc.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)