corrected typo in example for t5 model input argument
For the T5Model the argument name of the input has to be specified explicitly since the forward function is defined as
`def forward(self, **kwargs):`
and can therefore only handle keyworded arguments such as `input_ids=inputs_ids`.
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=h1) Report
> Merging [#2218](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/8efc6dd544bf1a30d99d4b5abfc5e214699eab2b?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/2218/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #2218   +/-   ##
=======================================
  Coverage   81.47%   81.47%           
=======================================
  Files         122      122           
  Lines       18344    18344           
=======================================
  Hits        14946    14946           
  Misses       3398     3398
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [transformers/modeling\_tf\_t5.py](https://codecov.io/gh/huggingface/transformers/pull/2218/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL21vZGVsaW5nX3RmX3Q1LnB5) | `96.55% <ø> (ø)` | :arrow_up: |
| [transformers/modeling\_t5.py](https://codecov.io/gh/huggingface/transformers/pull/2218/diff?src=pr&el=tree#diff-dHJhbnNmb3JtZXJzL21vZGVsaW5nX3Q1LnB5) | `81.22% <ø> (ø)` | :arrow_up: |

------

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> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=footer). Last update [8efc6dd...e280aa8](https://codecov.io/gh/huggingface/transformers/pull/2218?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Indeed, nice catch!