Fix a typo in examples/pytorch/translation/README.md
Author: Nietism
Pull request: yes

# What does this PR do?

There is typo in the original hyperlink.

Below is the original version:
```markdown
Based on the script [`run_translation_no_trainer.py`] (https://github.com/huggingface/transformers/blob/main/examples/pytorch/translation/ **run_translationn_no_trainer.py**)
```
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Comments:
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