Document link #load_dataset_enhancing_performance points to nowhere
Hi! This is indeed the link the docstring should point to. Are you interested in submitting a PR to fix this? https://github.com/huggingface/datasets/blame/master/docs/source/cache.mdx#L93

There seems already an anchor here. Somehow it doesn't work. I am not very familiar with how this online documentation works.
## Describe the bug
A clear and concise description of what the bug is.

![image](https://user-images.githubusercontent.com/11674033/175752806-5b066b92-9d28-4771-9112-5c8606f07741.png)


The [load_dataset_enhancing_performance](https://huggingface.co/docs/datasets/v2.3.2/en/package_reference/main_classes#load_dataset_enhancing_performance) link [here](https://huggingface.co/docs/datasets/v2.3.2/en/package_reference/main_classes#datasets.Dataset.load_from_disk.keep_in_memory) points to nowhere, I guess it should point to https://huggingface.co/docs/datasets/v2.3.2/en/cache#improve-performance?
