fix anchor
found using https://github.com/raviqqe/muffet while checking for broken links

```
muffet --rate-limit 5 -i "https://huggingface.co/docs/dataset-viewer/*" https://huggingface.co/docs/dataset-viewer
```
fix anchor: found using https://github.com/raviqqe/muffet while checking for broken links

```
muffet --rate-limit 5 -i "https://huggingface.co/docs/dataset-viewer/*" https://huggingface.co/docs/dataset-viewer
```