v1.48.0-rc.12
[v1.48.0-rc.12](https://github.com/ash-project/ash/compare/v1.48.0-rc.11...v1.48.0-rc.12) (2021-10-11) Bug Fixes: * move related field validations to resource * remove join_attributes, which didn't do anything anyway Improvements: * add resource registry validation