No gzip encoding from github
Don't accept gzip encoding from github, otherwise some files are not streamable + seekable.

fix https://huggingface.co/datasets/code_x_glue_cc_code_to_code_trans/discussions/2#64c0e0c1a04a514ba6303e84

and making sure https://github.com/huggingface/datasets/issues/2918 works as well