added model card for flexudys t5 model
- Created a model card for a fine tuned model.

# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=h1) Report
> Merging [#6759](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/434936f34a8b3154a79564c87f4cb50f5d57e050?el=desc) will **increase** coverage by `0.03%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/6759/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #6759      +/-   ##
==========================================
+ Coverage   79.47%   79.51%   +0.03%     
==========================================
  Files         157      157              
  Lines       28479    28479              
==========================================
+ Hits        22635    22644       +9     
+ Misses       5844     5835       -9     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/tokenization\_ctrl.py](https://codecov.io/gh/huggingface/transformers/pull/6759/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fY3RybC5weQ==) | `78.64% <0.00%> (-17.48%)` | :arrow_down: |
| [src/transformers/tokenization\_reformer.py](https://codecov.io/gh/huggingface/transformers/pull/6759/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fcmVmb3JtZXIucHk=) | `81.66% <0.00%> (-13.34%)` | :arrow_down: |
| [src/transformers/tokenization\_openai.py](https://codecov.io/gh/huggingface/transformers/pull/6759/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fb3BlbmFpLnB5) | `71.21% <0.00%> (-12.88%)` | :arrow_down: |
| [src/transformers/tokenization\_xlm\_roberta.py](https://codecov.io/gh/huggingface/transformers/pull/6759/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25feGxtX3JvYmVydGEucHk=) | `84.52% <0.00%> (-10.72%)` | :arrow_down: |
| [src/transformers/tokenization\_albert.py](https://codecov.io/gh/huggingface/transformers/pull/6759/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fYWxiZXJ0LnB5) | `87.50% <0.00%> (+58.65%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=footer). Last update [434936f...fd0b38d](https://codecov.io/gh/huggingface/transformers/pull/6759?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>really cool model card, thanks for sharing<|||||>File path was incorrect but I fixed it in d822ab636b6a14ed50f7bca0797c1de42c19de61. Thanks!<|||||>@julien-c thanks