Also ask for Halal/Kosher for shop=convenience

[peternewman]

Use case
We currently ask for Halal/Kosher for https://wiki.openstreetmap.org/wiki/Tag:shop=supermarket but there are also some https://wiki.openstreetmap.org/wiki/Tag:shop=convenience which sell Halal/Kosher products too. There are ~50 tagged in London (and none tagged with diet:halal=no/only) so it's likely it's just people specifically tagging some, rather than it not being very widespread.

Proposed Solution
Search for convenience too, no other changes required.

Happy to make the PR, just thought I should raise an issue as others may e.g. feel it's too rare or that such small shops wouldn't have that range (although I don't personally feel that's the case).

[westnordost]

ok