Hari Korrapati

Fixes: #3101 Followup PR to #3104 Used `interface{}` type for `PropertyValue` as it can be string, array or null according to the GitHub documentation [here](https://docs.github.com/en/rest/repos/custom-properties?apiVersion=2022-11-28#create-or-update-custom-property-values-for-a-repository). In Go, an `interface{}` can...