Add header and fix command
This finishes to fix #4742
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=h1) Report
> Merging [#5082](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/7291ea0bff57a017e71b1ea8ec01ff19da298bf0&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/5082/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #5082   +/-   ##
=======================================
  Coverage   77.24%   77.25%           
=======================================
  Files         133      133           
  Lines       22146    22146           
=======================================
+ Hits        17107    17108    +1     
+ Misses       5039     5038    -1     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/5082/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ191dGlscy5weQ==) | `90.61% <0.00%> (-0.12%)` | :arrow_down: |
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/5082/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `86.95% <0.00%> (+0.31%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=continue).
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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=footer). Last update [7291ea0...cc54022](https://codecov.io/gh/huggingface/transformers/pull/5082?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>LGTM