Models hub legal (#523)

* Add model 2023-07-04-leggen_contract_nli_en (#442)

Co-authored-by: gadde5300 <gadde5300@gmail.com>

* Add model 2023-08-04-legclf_law_stack_exchange_en (#499)

Co-authored-by: Mary-Sci <meryemyildiz366@gmail.com>

* 2023-08-07-legner_bert_subpoenas_sm_en (#502)

* Add model 2023-08-07-legner_bert_subpoenas_sm_en

* Update 2023-08-07-legner_bert_subpoenas_sm_en.md

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Co-authored-by: gadde5300 <gadde5300@gmail.com>
Co-authored-by: GADDE SAI SHAILESH <69344247+gadde5300@users.noreply.github.com>

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Co-authored-by: jsl-models <74001263+jsl-models@users.noreply.github.com>
Co-authored-by: gadde5300 <gadde5300@gmail.com>
Co-authored-by: Mary-Sci <meryemyildiz366@gmail.com>
Co-authored-by: GADDE SAI SHAILESH <69344247+gadde5300@users.noreply.github.com>