fix handling of additionalProperties in JSON schema generation

[monestereo]

Hey,

i found a bug when generating crds for the crunch-data/pgo chart. I think there happened a switch-up of the "anyOf" condition.
it was generating the "type" and "format" patch, which is required in generator.nix, only when additionalProperties.anyOf was set.

can be tested with:

nixidy.packages.generators.fromChartCRD {
  name = "pgo";
  chartAttrs = {
    chart = "pgo";
    repo = "oci://registry.developers.crunchydata.com/crunchydata";
    version = "6.0.0";
    chartHash = "sha256-4O+qzsCz/NiYbBc0QTsOA0QFx2FkG472QlmhegnpFsg=";
  };
};

all my other charts still seem to work fine.

[arnarg]

Looks good! Thanks for catching this and fixing it! :)