wrong parameter description in /wfp-market

[cjhendrix]

hdx-hapi/hdx_hapi/endpoints/get_wfp_market.py

Line 56 in 34a6cc9

Query(max_length=32, description='Filter the response by the unique code identifying the commodity.'),

The descriptions should be:

...unique code identifying the market
and
Filter the response by the name of the market

[IanHopkinson]

Fixed in #171