pgsql: meson: rename html_help target to htmlhelp

meson: rename html_help target to htmlhelp

Reported-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: /messages/by-id/3fc3bb9b-f7f8-d442-35c1-ec82280c564a@enterprisedb.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7730ceb43fe5ecaa2b3cb26eb0ed8ad2e18c2d46

Modified Files
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doc/src/sgml/meson.build | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)