Typo in Reformer model card
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/5147?src=pr&el=h1) Report
> Merging [#5147](https://codecov.io/gh/huggingface/transformers/pull/5147?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/f45e873910e60d89511ae0193711e71c5c710468&el=desc) will **decrease** coverage by `0.00%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/5147/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/5147?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #5147      +/-   ##
==========================================
- Coverage   77.19%   77.19%   -0.01%     
==========================================
  Files         133      133              
  Lines       22233    22233              
==========================================
- Hits        17163    17162       -1     
- Misses       5070     5071       +1     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/5147?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/5147/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9maWxlX3V0aWxzLnB5) | `75.00% <0.00%> (-0.41%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/5147?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/5147?src=pr&el=footer). Last update [f45e873...e655c44](https://codecov.io/gh/huggingface/transformers/pull/5147?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Thanks a lot @flozi00 !