Evals not eval for evaluation script (typo)

In the READme "Launching evaluations" section there is a typo in the three following scripts:

```
python -m evals.main \
--fname configs/eval/vitl16_in1k.yaml \
--devices cuda:0 cuda:1 cuda:2
```
```
python -m evals.main_distributed \
--fname configs/eval/vitl16_in1k.yaml \
--folder $path_to_save_stderr_and_stdout \
--partition $slurm_partition
```

```
python -m evals.main_distributed \
--fname configs/eval/vitl16_k400.yaml \
--folder $path_to_save_stderr_and_stdout \
--partition $slurm_partition
```

for the fname argument eval should be evals.

Open the README's "Launching evaluations" section and inspect the three command examples shown in the issue. Change the three fname values from eval to evals, then verify that all three documented commands use the corrected module path.

Written by the indexing model from the issue text.