Updated link for `generate` method
Author: heiko-hotz
Pull request: yes

The previous link did not lead to the `generate` method and therefore didn't show the `kwargs` for text generation. This new link rectifies this.

# What does this PR do?

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This PR improves the documentation. When trying to view the keyword args for text generation, the documentation currently links to the wrong place. This became evident when trying to answer (this question)[https://discuss.huggingface.co/t/where-can-i-get-all-the-parameters-for-each-pipeline-task/17564] in the HF forum. This PR rectifies this and links to the right place in the documentation that shows the list of keyword args for text generation.


## Before submitting
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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_17134). All of your documentation changes will be reflected on that endpoint.

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