[docs] Fix broken links to MUI X docs

[mapache-salvaje]

mui/mui-x#16302 breaks several links in the Material UI docs and MUI blog, so this PR cleans those up.

[mui-bot]

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• docs/data/material/migration/pickers-migration/pickers-migration.md

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Generated by 🚫 dangerJS against 7e366ed

[mapache-salvaje]

From that PR in the X repo:

Broken links found by `docs:link-check` that exist:

- https://mui.com/x/react-charts/getting-started/
- https://mui.com/x/react-data-grid/#premium-plan
- https://mui.com/x/react-data-grid/getting-started/
- https://mui.com/x/react-data-grid/getting-started/#feature-comparison
- https://mui.com/x/react-date-pickers/fields/#accessible-dom-structure
- https://mui.com/x/react-date-pickers/getting-started/
- https://mui.com/x/react-date-pickers/quickstart/#date-and-time-types
- https://mui.com/x/react-tree-view/#rich-tree-view
- https://mui.com/x/react-tree-view/#simple-tree-view
- https://mui.com/x/react-tree-view/getting-started/

[DiegoAndai]

Thanks @mapache-salvaje!

Curious: Was this caught by our CI or any other monitoring system?

[mapache-salvaje]

@DiegoAndai this was the result from running pnpm docs:link-check on the X side after I changed the names and locations of some of the docs over there in the PR linked above. These links aren't broken yet, but that PR should land in the next X release at the end of this week, and then they'll all be broken over here and picked up by the CI check. Does that make sense?

[DiegoAndai]

Thanks for the explanation 👍🏼