Docs: add more time zone guidance (#79595)
* Created report time zone section with added guidance
* Added more information
* Updated from review suggestions
* Update docs/sources/dashboards/create-reports/index.md
Co-authored-by: Agnès Toulet <35176601+AgnesToulet@users.noreply.github.com>
* Ran prettier
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Co-authored-by: Agnès Toulet <35176601+AgnesToulet@users.noreply.github.com>
(cherry picked from commit f9dcc9ff90)
Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>