Update README.md
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/4315?src=pr&el=h1) Report
> Merging [#4315](https://codecov.io/gh/huggingface/transformers/pull/4315?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/4bf5042240d33286460b83f3dbf9be77500faab3&el=desc) will **increase** coverage by `0.00%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/4315/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/4315?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #4315   +/-   ##
=======================================
  Coverage   78.16%   78.16%           
=======================================
  Files         120      120           
  Lines       20005    20005           
=======================================
+ Hits        15636    15637    +1     
+ Misses       4369     4368    -1     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/4315?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/4315/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `92.77% <0.00%> (ø)` | |
| [src/transformers/trainer.py](https://codecov.io/gh/huggingface/transformers/pull/4315/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90cmFpbmVyLnB5) | `41.09% <0.00%> (+0.28%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/4315?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/4315?src=pr&el=footer). Last update [4bf5042...ef8a2ed](https://codecov.io/gh/huggingface/transformers/pull/4315?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
