Update README.md
- Model pic uploaded to a more permanent place
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5371?src=pr&el=h1) Report
> Merging [#5371](https://codecov.io/gh/huggingface/transformers/pull/5371?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/b9ee87f5c730d72b326ef65089a574a0b519e827&el=desc) will **increase** coverage by `0.06%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/5371/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/5371?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #5371      +/-   ##
==========================================
+ Coverage   77.49%   77.56%   +0.06%     
==========================================
  Files         138      138              
  Lines       24314    24314              
==========================================
+ Hits        18843    18858      +15     
+ Misses       5471     5456      -15     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/5371?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/5371/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9maWxlX3V0aWxzLnB5) | `79.93% <0.00%> (+0.33%)` | :arrow_up: |
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/5371/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `84.75% <0.00%> (+2.05%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/5371?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/5371?src=pr&el=footer). Last update [482a599...812f63a](https://codecov.io/gh/huggingface/transformers/pull/5371?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
