pkgdown build error

[maelle]

👋 @leonawicz! Through https://ropensci.r-universe.dev/builds we see

 ✖ Quitting from tiler.Rmd:207-214 [map1]
Caused by error:
! Unknown tile provider 'Stamen.Toner'; either use a known provider or pass `check = FALSE` to `addProviderTiles()`
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Standard output:
0...10...20...30...40...50...60...70...80...90...100 - done.
0...10...20...30...40...50...60...70...80...90Generating Base Tiles:
Generating Overview Tiles:
...100 - done.
---
Standard error: