Incorrect error with `axiom dataset list` for bad deployment alias

[darach]

When using an alias to that is no longer valid the axiom dataset list command returns an error of the form:

$ AXIOM_DEPLOYMENT=bogus-no-longer-valid-env axiom dataset list
Error: cannot decode response with unknown content type

This can be cross-checked with axiom auth status which will show valid and non-valid auth tokens by alias