add icon for tower:construction=dish

[k-yle]

Description, Motivation & Context

Some values of tower:construction already have icons, but not dish, even though it's rendered by OSM Carto.

Related issues

­-

Links and data

Relevant OSM Wiki links:

• https://osm.wiki/Tag:tower:construction=dish

Relevant tag usage stats:

• 4361

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[tordans]

LGTM

https://pr-1716--ideditor-presets-preview.netlify.app/id/dist/#locale=en&map=19.00/54.65464/21.06559&disable_features=boundaries&background=Bing&%3Fnode=10063658184&id=n10063658184