fix parking=sheds description

[matkoniecz]

Description, Motivation & Context

see #2110

Related issues

fixes #2110

Links and data

Relevant OSM Wiki links:

https://wiki.openstreetmap.org/wiki/Tag:parking%3Dsheds

Relevant tag usage stats:

irrelevant

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[matkoniecz]

[k-yle]

seems like an obvious and straightforward fix to me 👍

[matkoniecz]

Note: people on IRC complained that parking=sheds data is utter mistagged garbage, at least in UK

to the point that it was proposed to remove the option altogether