docs: strip Figshare DOI refs (account disabled, in support review)

README.md

@@ -78,10 +78,8 @@ This Space visualizes data from the [CalcFi Open Data project](https://calcfi.ap
 - Calculator registry: [10.5281/zenodo.20567964](https://doi.org/10.5281/zenodo.20567964)
 - Full 37-record Zenodo archive: https://zenodo.org/communities/calcfi
 
-**Multi-registry mirrors:**
+**Multi-registry mirror:**
 - OSF: [10.17605/OSF.IO/2J45Q](https://doi.org/10.17605/OSF.IO/2J45Q) (methodology paper)
-- Figshare: [10.6084/m9.figshare.32593542](https://doi.org/10.6084/m9.figshare.32593542) (methodology paper)
-- Canonical Open Data bundle (Figshare): [10.6084/m9.figshare.32332290](https://doi.org/10.6084/m9.figshare.32332290)
 - Harvard Dataverse: [10.7910/DVN/2LJXZM](https://doi.org/10.7910/DVN/2LJXZM)
 
 **Discovery surfaces:**