add Carl-Zeiss-Stiftung in funding.

datacite.yml

@@ -89,6 +89,7 @@ funding:
   - "NIH, R01 EY026927"
   - "NIH, T32-EY-002520-37"
   - "NSF, 1707400"
+  - "Carl-Zeiss-Stiftung"
 
 
 # Related publications. reftype might be: IsSupplementTo, IsDescribedBy, IsReferencedBy.