R pkgdown Multi Version docs

Version updated for insightsengineering/r-pkgdown-multiversion to version v2.4.4.

• This action is used across all versions by 77 repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

Full Changelog: https://github.com/insightsengineering/r-pkgdown-multiversion/compare/v2...v2.4.4

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