docs: Miscellaneous documentation fixes (backport #18316)

[mergify]

Related to https://github.com/unoplatform/private/issues/519

PR Type

What kind of change does this PR introduce?

• Documentation content changes

Description

• Fix details for 5.4 Migration documentation

• Remove the "preview" term in the documentation in regard to Rider plugin

• Fix HotReload Tab content issues for the Troubleshooting section

  tab.issue.HR.Troubleshooting.section.mp4

PR Checklist

Please check if your PR fulfills the following requirements:

• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Validated PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• Commits must be following the Conventional Commits specification.

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This is an automatic backport of pull request #18316 done by [Mergify](https://mergify.com).