add diet:organic=* as deprecated

[tiptoptom]

Description, Motivation & Context

Related issues

Closes #1360

Links and data

Relevant OSM Wiki links: https://wiki.openstreetmap.org/wiki/Key:diet:*

Relevant tag usage stats: https://taginfo.openstreetmap.org/keys/diet%3Aorganic

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## Test-Documentation

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### Wording

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