bump build number

Author: h-vetinari

recipe/meta.yaml

@@ -26,7 +26,7 @@ source:
     folder: testing
 
 build:
-  number: 5
+  number: 6
   # for cuda support, building with one version is enough to be compatible with
   # all later versions, since arrow is only using libcuda, and not libcudart.
   skip: true  # [cuda_compiler_version not in ("None", cuda_compiler_version_min)]