Support selection of media type in %%sparql cell magics

[brianok-aws]

Is your feature request related to a problem? Please describe. When using the %%sparql cell magic, I cannot change the media type that the results are printed in. If I was submitting an HTTP query, I would be able to.

Describe the solution you'd like I would like a parameter to be added to the %%sparql magic to allow me to specify the media type to output the results in. For example, there is a long list of media types supported in Neptune listed at https://docs.aws.amazon.com/neptune/latest/userguide/sparql-media-type-support.html

Describe alternatives you've considered Writing HTTPS requests in Python to achieve this is not user friendly, non-programmer friendly, and loses the convenience of the %%sparql magic.

Additional context