Minor fixes to the manual pages

Description

Minor fixes to the manual pages (mainly broken formulas)

News snippet

Minor fixes to the manual pages

Checklist

• I have checked that my code follows the Octopus coding standards
• I have added tests for all the new features added in this request.

changed milestone to %16.0

added Webpage label

assigned to @martin.lueders

requested review from @nicolastd

added 1 commit

• ffe7af2b - rerun without OMP and fixed old-style link

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marked this merge request as draft

Marked as draft as I still saw some broken links, I would like to fix before the release.

added 1 commit

• b2239436 - update wiki-style links

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marked this merge request as ready

approved this merge request

merged

mentioned in commit 8e93a058

added Documentation in Changelog labels